Genesis 1 and 2 don’t say much about the conditions on the earth when humans were first created. The Bible does say that God declared them to be “very good.” This leads some Christians to picture the earth at the time of Genesis 1 and 2 as a place where everything was as perfect as one can imagine.

It’s tempting to say that everything in the world that annoys or hurts us is a result of humanity’s fall into sin and the Curse. For instance, we might be frequently annoyed by a puddle in our garage. When snow melts off our car, it drains to a low spot and makes a big puddle that just happens to be exactly between our car and the door into the house, right where we want to walk. Why is this low spot in our garage right in that most annoying of places? Is it because of the Fall? Probably not. Maybe the person who poured the concrete was lazy, but more likely the ground underneath that particular spot was a bit softer, and it sunk a little more than the surrounding dirt after the concrete was poured. It’s just part of the natural operation of creation. The puddle itself isn’t really a result of the Fall. More likely, the results of the Fall are seen in the fact that the puddle annoys us so much.

Astronomy and geology give us clear evidence that the fundamental laws of nature have remained unchanged since the beginning of creation. Whatever the effects of the Fall, they do not seem to have changed the basic laws of physics.

Quite apart from any evidence in nature, some features in the biblical text itself suggest that God’s original creation was not free of pain and difficulty. For example, in Genesis 3 after Adam and Eve sinned God said to Eve, “I will greatly increase your pains in childbearing; with pain you will give birth to children” (v.16). The word increase implies that Adam and Eve already understood what pain was.

In Genesis 1 God does not declare the world “perfect”; he declares it “good.” And this good may not necessarily mean completely safe. Also in Genesis 1 God commands human beings to “fill the earth and subdue it.” Biblical scholars tell us that the word subdue is not a “wimpy” word. D. C. Spanner writes,

. . . the mandate given to man in Genesis 1:28 which reads, “Be fruitful and multiply, and fill the earth and subdue it; and have dominion . . . over every living thing . . . “ charged man with “subduing’” the earth. The Hebrew word for “subdue” is kabas, and in all its other occurrences in Scripture (about twelve in all) it is used as a term indicating strong action in the face of opposition, enmity or evil. Thus, the land of Canaan was “subdued” before Israel, though the Canaanites had chariots of iron (Josh. 17:8; 18:1); weapons of war are “subdued,” so are iniquities (Zech. 9:15; Micah 7:19). The word is never used in a mild sense. It indicates, I believe, that Adam was sent into a world where all was not sweetness and light, for in such a world what would there be to subdue? The animals, it suggests, included some that were wild and ferocious, and Adam was charged to exercise a genuinely civilizing role and to promote harmony among them. —D. C. Spanner, Biblical Creation and the Theory of Evolution, Paternoster, 1987.

To get a sense of how the word subdue is used elsewhere in Scripture, we can survey how it is translated in other passages. The Hebrew kabas is translated as bondage (Neh. 5:5), force (Esther 7:8), subdue (Gen. 1:28; Micah 7:19; Zech. 9:15), subdued (Num. 32:22, 29; Joshua 18:1; 2 Sam. 8:11; 1 Chron. 22:18), subjection (Jer. 34:11, 16), under (2 Chron. 28:10). (See here.)

Genesis 2 speaks of a garden. Today we think of gardens as open places, but in the Near East at the time of the Old Testament, gardens were usually walled enclosures, places of refuge from the outside world. If the original creation did not include some danger, what need would there be for a walled refuge? While this is different than our human picture of “perfect,” it doesn’t necessarily conflict with the teaching that God created it good. God made a world that is a good and fitting home for humanity and commissioned us as stewards over it. This commission involves challenges to subdue as well as providing stewardly care.

To read more on these ideas, see the following:

Munday, John C. “Animal Pain: Beyond the Threshold?” Perspectives on an Evolving Creation. Keith B. Miller, ed. Grand Rapids, Mich.: Wm. B. Eerdmans, 2003.

Snoke, David. “Why Were Dangerous Animals Created?” Perspectives on Science and Christian Faith, Vol. 56, June 2004.

Yancey, Philip. Where Is God When It Hurts? Grand Rapids, Mich.: Zondervan, 1977, 1990, 2002.

For more questions like this one, see Chapter 13 of Origins, or see the online supplement on Faith Alive’s website. Tomorrow we’ll look at how God could call a creation that included pain and extinction “good”.

Excerpt from the online supplement to Chapter 13 of Origins: Christian Perspectives on Creation, Evolution, and Intelligent Design (Grand Rapids, MI: Faith Alive Christian Resources), 2011. Reprinted with permission. To purchase a copy of the book or e-book, call 1-800-333-8300 or visit www.faithaliveresources.org.

Want a free copy of Origins?  For a limited time, donations of $50 or more will receive a  copy of the book!

A common argument leveled against the theory of evolution is that scientists have not been able to produce the expected transitional fossils that show the change of one species into another. If evolution were true, wouldn’t there be instances of clear intermediary species, like, for example, a species that was half whale and half hippo to show the transition between those two? In this BioLogos podcast, Kelsey Luoma addresses this misconception about what a transitional fossil actually is. Rather than a mix between two related species, transitional fossils point back to the common ancestors that modern species share. The fact is that the number of transitional species is massive and it grows with each passing year. Given the rarity with which organisms are actually fossilized, the amazing thing is actually the completeness of the fossil record, not its incompleteness. The transitional species story strongly supports, and certainly does not disprove, evolutionary theory. ¹

1. To hear the full audio clips which have been referenced go to:

• Rational Response Debate with Kirk Cameron (from Way of the Masters)
• Behind the Scenes with Dr. Neil Shubin (from Cincinnati Museum Center)
• Mark Norell Publishes New Archaeopteryx Findings (from American Museum of Natural Sciences)
• Texas A&M Professor Discusses Findings of Autralopithecus Sediba and its Relationship to Humans (from Texas A&M University)
• Intro/outro music composed by Martin Minor (Minor2Go).

An audio only version of the podcast can be downloaded here.

Transitional Fossils

Some time ago, the Discovery Institute’s Casey Luskin commented on the human origins exhibit at the Smithsonian Institution, suggesting that palaeoanthropologists use evolutionary theory to describe the progression of the human lineage even when they don’t have transitional fossils with which to work. He writes:

What's ironic, however, is that if you ask the question How Do We Know Humans Evolved? the answer you’re given is, “Fossils like the ones shown in our Human Fossils Gallery provide evidence that modern humans evolved from earlier humans.” So whether you find fossils or you don’t, that’s evidence for evolution.

Indeed, it has become an article of faith for those espousing both the young earth creation (hereafter YEC) model and many who hold to the intelligent design model that transitional fossils do not exist and therefore evolution has not taken place. Support for this position usually entails attacking the weak areas of the fossil record, where burial processes have left us little with which to work, or the creation of straw men arguments in which transitional fossils are defined in such a way that none could ever be found. Often this centers on the concept of “missing link,” a term that is habitually used in the popular press and young earth creation and intelligent design literature when referring to fossil remains but which has little to no meaning for biologists or palaeontologists. As Ahlberg and Clack (Ahlberg and Clack 2006) write:

But the concept has become freighted with unfounded notions of evolutionary ‘progress’ and with a mistaken emphasis on the single intermediate fossil as the key to understanding evolutionary transitions. Much of the importance of transitional fossils actually lies in how they resemble and differ from their nearest neighbours in the phylogenetic tree, and in the picture of change that emerges from this pattern.

Contrary to common misconceptions, the fossil record does not record one single lineage for any family of organisms but rather a series of branches, with many related species coexisting synchronously. Darwin hypothesized that the evolutionary record reflected this bushiness and drew such a diagram in his journal. At the time, though, he had little in the way of fossil evidence to back up this position. Much has changed since his day.

An analogy for understanding this “bushiness” was best described by Prothero and Buell (Prothero and Buell 2007). They suggest that the reader consider his or her own genealogy. You and your siblings are the direct descendents of your parents and, while you are similar to them, each of you has different characteristics not shared with them as well as characteristics that you do share. Your parents have siblings as well (your aunts and uncles), and your grandparents are their last common ancestors. These siblings have their own children (your cousins), who have different and similar traits relative to their parents. They are broadly recognizable as being related to you (“oh, I see you have Aunt Edna’s nose”) but three or four generations out, they will become less and less so. These are the “nearest neighbours” that Ahlberg and Clack describe. In this analogy, each of these cousins represents a transitional form from what was (your grandparents) to what will be down the road.

For example, no one would confuse a frog with a salamander but if you trace the fossil record of each back in time, eventually you encounter a fossil, Gerobatrachus hottoni which was recently discovered (Anderson et al. 2008) that is best described as a “frogamander,” having the basal characteristics of both frogs and salamanders. Had we seen such an animal at the time, it is likely we would not have found it remarkable because it would have resembled the species around it. One lineage eventually diverged into frogs, salamanders and other amphibians. Most (just like Darwin proposed in his tree diagram with the little hatch marks at the tip of many branches) went extinct.

Taxonomy and the Beginnings of Human Origins

All life is classified based on a system devised by Carolus Linneaus in 1735 in his remarkable work Systema Naturae. This system gives all recognized species an individual place based on a system of hierarchy. The study of classification is known as taxonomy. A taxonomic ranking for humans would be this:

When a fossil is excavated, the first thing that the palaeontologist does is make a taxonomic assessment of where it fits in a sequence of known fossils. Traits that are shared with other like species or genera are referred to as primitive traits. Examples of this in humans are five fingers and the presence of three arm bones. We share this with all mammals. Traits that are new or are not shared with other like species are referred to as derived traits. Examples of this in humans are the skeletal changes in the pelvis and the foot to allow for walking upright. We do not share these with any other primates.

Transitional fossils in the human fossil record are distinguished at both the genus and species level. This group includes the extinct genera Ardipithecus and Australopithecus and the current genus Homo. All species except Homo sapiens are extinct. Much of the recent study of early humans focuses on the transition from Ardipithecus (‘Ardi’) to Australopithecus (‘Lucy’ and similar fossils) and from Australopithecus to Homo, the genus that led eventually to us. While each of the australopithecine species identified in the fossil record has derived characteristics that separate them from their ancestors and from each other, only one led to the genus Homo.

In future posts, I will describe the evidence for human evolution and why this evidence is compelling. It suggests that we have had a long, varied history filled with great leaps of change, crushing defeat, and eventual expansion into all areas of the globe.

Notes

Ahlberg, P. & J. Clack (2006) A firm step from water to land. Nature, 440.

Anderson, J. S., R. R. Reisz, D. Scott, N. B. Frobisch & S. S. Sumida (2008) A stem batrachian from the Early Permian of Texas and the origin of frogs and salamanders. Nature, 453, 515-518.

Prothero, D. & C. Buell. 2007. Evolution: What the fossils say and why it matters. Columbia Univ Pr.

Evolution and the Problem of Evil

Let me begin by expressing appreciation for the commitment and intent of BioLogos. Francis Collins was speaking at nearby Tulane University a couple of years ago when my son was a senior in high school, and I brought him along to hear this noted Christian biologist’s presentation to help prepare him for challenges he would experience (as he is now) in college. This is a tremendously valuable ministry. However, as a philosopher and a theologian I do have concerns about some of the theological implications of the BioLogos theistic evolution view, particularly regarding the problem of evil.

The problem of evil is one of the most persistent and intuitive challenges to the Christian faith and the existence of God. The classic defenses or theodicies that have been used to answer this challenge include the Freewill Defense (God is not responsible for much of evil because it is caused by the free actions of humans), the Soul Making Defense (God allows or sends some evils or suffering in order to build human character in overcoming adversity), and the Eschatological Defense (although the cause of some suffering may be beyond our understanding, whatever suffering we may experience in this life cannot compare with an eternity of blessing in heaven).

These theodicies or defenses to the problem of evil, however, normally presuppose the standard view of divine creation. Were one to propose creation by means of theistic evolution, some of the presuppositions for these responses to the problem of evil no longer function. Therefore, advocating some form of theistic evolution poses problems for standard explanations of the problem of evil.

Cornelius Hunter has recently published Darwin’s God: Evolution and the Problem of Evil,¹ an excellently researched book which re-examines Darwin’s motives for developing the theory of evolution. Hunter’s main thesis is that Darwin’s intent was not to undermine belief in the existence of God, but to afford a defense of God’s moral nature. The viciousness of nature caused Darwin and some of his contemporaries to desire to disconnect God’s role in creation from this viciousness in nature, and the blind process of natural selection is the vehicle for disassociating God from the vulgarities of nature. In essence, then, Hunter’s argument is that Darwin’s theory was a form of theodicy – sheltering God’s goodness against the accusation that He is the author of the evil in nature.

Hunter’s thesis sounds hauntingly similar to that of the early Gnostics, who sought to insulate God from the evil material world. They therefore proposed intermediary aeons, archetypes, or a demiurge to isolate the purity of God from the evil of nature. The Darwinian account sharply differs from the biblical account in at least three crucial ways:

• The Darwinian account removes God from being directly involved in much of creation by utilizing natural processes instead, while the biblical account presents God as directly involved in the details of creation, both in the beginning and throughout history through his providential care.
• The Darwinian account blurs the distinction between humans and other animals, while in Scripture humans are a distinctive and special creation.
• The Darwinian account presents God as apathetic and disinterested in the moral status of animals, while the scriptural account presents God (though giving primary focus to humans) as vitally interested in the moral status of animals, and indeed for the redemption of the entire created world.

Another problem with Hunter’s thesis is that whatever Darwin’s original motivation might have been, the novelty of Hunter’s thesis underscores the fact that this is not how Darwin’s ideas predominantly have been used and understood. No one (including contemporary evolutionary biologists) seriously believes Darwin’s ideas as he presented them. Darwin’s ideas about evolution have themselves evolved. ( see Falk, Part 2) So even if Hunter’s thesis were correct about Darwin’s original motivation for the problem of natural selection, this has little relevance to contemporary evolutionary biology.

Any such Darwinian evolutionary biology also undermines classical defenses for God’s goodness. For example, the Christian group BioLogos has presented the perspective that God created all living organisms, including humans, through a gradual process that includes natural selection, group selection, genetic drift or other such physical processes, with God possibly intervening at some undefined points. While this BioLogos approach (which might be labeled a variety of “gradualism” with regard to creation) includes a role for God in creation (as opposed to pure Darwinian evolution), some of the same problems involved with the problem of evil pertain to the BioLogos view as well. In fact, the specific role that God plays in evolution remains somewhat vague and ill-defined. (see Falk, Part 1) Without BioLogos providing a clearer and more precise differentiation between itself and Darwinian evolution – and thus building a clear “Chinese wall” between their view and that of Darwinian evolution -- these views appear to be very close, and the problems that pertain to one view pertain to the other view (at least in part) as well. The following problems arise with regard to the problem of evil in relation to forms of creation by gradualism.

The Best of All Possible Worlds

First of all, it is incumbent upon a good God to produce an optimally good world. We could not necessarily expect an evil or morally mixed God to produce a good world, but we have every reason to expect a good and beneficent God (Matt. 5:48; 1 John 1:5, 4:7-8) to produce the “best of all possible worlds” (given human freewill). In the biblical account, therefore, the evil and suffering we witness in nature and in human experience is not accountable to God because of a defective process in creation, but rather it is a result of the moral Fall of the first humans and subsequent sin by their descendents. However, gradualism has no such vehicle to defend God against the accusation of being responsible for natural and physical evil and suffering. (see Applegate, Falk, and Haarsma, Part 2).

Human Distinctiveness

Second, if God created all living species, including humans, through a gradual evolutionary process that includes common descent from nonhuman primates, there is no clear line to draw a moral or spiritual distinction between humans and other living beings. (see Falk, Part 2).. Yet fundamental to any view of a moral universe is the belief that humans are created in the image of God in a way that is uniquely above all other sensate species (Ps. 8:4-8), and included in this image is our soul and our moral capacity. It is difficult to imagine how humans could receive the image of God through some sort of physical process. Instead, the Bible describes God as being directly and personally involved in creating the human soul by breathing it into mankind (Gen. 2:7). (see O’Connor, Part 1). In the specific language of the biblical account (if not to be discounted, allegorized, or completely ignored), God created human souls directly, not indirectly through some impersonal process. Gradualism offers no clear answer as to how a human soul reflecting the image of God could come about; in fact, such a unique thing in all of creation is everything but gradual or natural. (see Bishop, Part 2).

Whence Cometh Freedom?

Thirdly, even if God intervened at various points in theistic evolution to create new forms from which other species evolve, this does not afford a satisfactory account of human freewill. If humans are not a unique and distinct creation (as the biblical account makes quite clear), but are with other apes the product of a single ancestor, from whence did freewill arise? How can we account for some mutations having freewill and others not having it?

Some quasi-materialists propose some form of epiphenomenalism in which the mind emerges somewhat magically from material cells. This proposal is devoid of any convincing scientific evidence, but it is the only alternative left for materialists to espouse in order to account for some of the most basic human intuitions – that our minds are more than merely a physical organ, that our choices are genuine expressions of freewill, and that we are free moral agents who are responsible for our actions.

Evolutionary biology has no scientific evidence to respond to these basic human intuitions other than to assert that “there is no ghost in the machine” and that any apparent choices are actually mechanical outworking of hard determinism predetermined by prior physical causes. (see O’Connor, Part 2). Therefore, if human choices are merely illusions, humans cannot be held morally accountable, all blame and responsibility reverts back to the God who created this world.

The Problem of Pain

Fourth, gradualism has no moral explanation for animal pain. If humans are the product of an earlier ancestor, it may have taken thousands or millions of years for life to evolve to that point, or for humans to evolve from an earlier primate ancestor. How can the pain of these creatures (some of them quasi-human or proto-human) be justified? (see Schloss, Part 2) This is specifically the issue that worries many Christian ethicists about cloning. Each experiment in animal cloning has produced hundreds of “monsters” before the clone is successful. What if we were cloning humans? What would be the moral implications of creating hundreds of “monsters” just to develop one clone?

The unanimous view is that this would be morally unjustifiable, but this is uncannily similar to the notion of creating animals who suffer for millions of years before evolution finally produced humans. (see Schloss, Part 3) In the biblical creation accounts, pain and suffering comes into the world after the Fall and as a result of the Fall of the earliest humans, and thus God is absolved of direct responsibility for this pain. In this gradualist account, pain and suffering precede the Fall. Millions of generations of sensate beings would have suffered and died before the Garden of Eden. Why would God allow this suffering of innocents for millions of years? (see Schloss, Part 3)

Ironically, Hunter’s Darwinian explanation in Darwin’s God doesn’t work for the BioLogos perspective at this point, because God is somewhat more directly involved at several steps in creation than in the purely Darwinian perspective, so it is God who must shoulder the blame for this undeserved pain. (see Schloss, Part 2)

Another attempt to affirm a gradualist view of creation in which pain preceded the creation of humans was by William Dembski, who in his book The End of Christianity: Finding a Good God in an Evil World² proposed that the animal world existed in pain for millennia before the creation of humans, and thus the pain of these animals was applied retroactively from the later Fall (pp. 9-10). This proposal was not well received by many in the evangelical world because it depicts God causing pain to sensate beings even before the cause of the pain took place, and Dembski ultimately felt compelled to post a clarification of his views.³ So, the reality of animal pain before the Fall in the gradualist account of creation heightens the problem of evil rather than resolving it.

Death and the Nature of God

Fifth, in orthodox Christian theology, death is seen as the ultimate punishment for the Fall of Adam and Eve. There was a time of created goodness from when humankind has fallen. All human suffering, animal suffering, natural disasters, and death was ultimately the result of the God’s punishment for human sin, the curse after the Fall as described in Genesis 3. (see Schloss, Part 1)

However, in the gradualist evolutionary account, there is no Fall.(see Applegate, Falk, and Haarsma, Part 2). If anything, there is a “rise,” as human beings “come of age” and become morally responsible at some point in the process of evolution from prehuman primates. There are multiple problems with this proposal from a theological perspective:

• It is one thing to apply symbolic interpretations to the first three chapters of Genesis; it is another to eliminate the historical reality of the Fall altogether.(see Applegate, Falk, and Haarsma, Part 2). .
• In the biblical view of creation, God creates humans in a paradisical Eden, and humans are ejected from Eden after their sin. In the gradualist view,(see Applegate, Falk, and Haarsma, Part 2). there never was an Eden, and humans never enjoyed the kind of original created goodness described in Scripture.
• In the biblical view of creation, separation from God and death are the punishments for human sin. In the gradualist view, there never was an Edenic paradise, and persons were created to die. Sin has no real causal connection with physical death. (see Schloss, Part 1)

As Jeff Schloss reminds us in Part 1 of his paper, "Although commentators differ over whether the Pauline description of death in Romans 5 refers to spiritual and/or physical death, the passage clearly focuses on humans. It identifies humanity as the subject of infection, instigated and promulgated by initial and ongoing human sin: “in this way death came to all people, because all sinned” (Romans 5:12)."

• In the biblical view of creation, humans were created “a little lower than the angels, crowned with glory and honor” (Ps. 8:5). In the gradualist view, humans emerged from previously created nonhuman primates. This is a profound re-envisioning and diminishment of the Christian anthropology found in the Bible. (see Falk, Part 2)

Darrel Falk put it this way: ”Christians recognize that our material ordinariness is radically transformed by the presence and promises of God. Exactly as with the people of Israel among the nations, so humans among the animals: our special identity rests in the free choice of the Creator to give us his himself and his name. If we recognize that human specialness rests on God’s fellowship with and call upon us, and that we—alone of all creatures—are enabled by God to bear his image in the world, then anything Darwin said about the physical continuity between humans and animals is irrelevant."

We think this last significant issue raised by Dr. Lemke shows just how important this Southern Baptist Voices Series has been, because it highlights the fact that many of the theological concerns raised here do not emerge from the scientific data about life's origins or the discipline of evolutionary biology. There are surely theologians who look at creation this way, but to the extent they do so, their views emerge from their own theological considerations; they are not obligatory extrapolations which emerge from the science itself.

• The Bible describes God creating a beautiful paradisicial Eden with sinless humans, which was lost only because of human rebellion and sin. The gradualist account posits God creating a substandard world that had to evolve to reach even the sad levels of contemporary life. This imperfect creation reflects on the nature of God. Why would a perfectly good God create such an imperfect world? Why or how could a moral God create humans to be already fallen? Orthodox Christian theology affirms that God is already perfect in all His attributes, and does not evolve or change in His essence. The theology more apposite to the gradualist account is Process Theology, in which evolution in creation mirrors evolution within God himself, as he moves from a powerful but imperfect being toward a more perfect being. In fact, Process Theology was designed with a view to harmonizing Christian theology with evolutionary presuppositions. But Process Theology is not held to be orthodox by most evangelical Christians, particularly with regard the nature and perfection of God.

At the core of the Christian worldview is the biblical metanarrative of creation, fall, and redemption. The evolutionary gradualist perspective radically rewrites this standard Christian account by essentially merging the creation and fall into a single event. Humans were created as finite and fallen, not placed in a paradise with created righteousness. This gradualist approach squares well with an evolutionary account, but it does not square well with the biblical creation accounts in Scripture.

Notes

1. Cornelius Hunter, Darwin’s God: Evolution and the Problem of Evil (Waco: Brazos Press, 2001).
2. William A. Dembski, The End of Christianity: Finding a Good God in an Evil World (Nashville: B&H Academic, 2009).
3. Tom Nettles, review of The End of Christianity: Finding a Good God in an Evil World, by William Dembski, in Southern Baptist Journal of Theology 13.4 (2009): 80–85. A partial defense and Dembski’s clarification are found in David Allen, “A Reply to Tom Nettles’ Review of William A. Dembski’s The End of Christianity: Finding a Good God in an Evil World,” a white paper at the Center for Theological Research (February 2010), available online (PDF).

Introduction

One of the reasons that some of us are hesitant to accept evolutionary creation is that it seems to make God responsible for the suffering and death of innumerable creatures over millions of years—before humans ever existed or sinned against their creator. Since we believe in and worship a God who is loving, benevolent, and all-powerful, it sounds quite implausible that our God would have created a world like that; therefore, any scientific evidence for evolution must be incorrect.

Other people look at the scientific evidence for evolution and find a compelling case that it has taken place during our earth's history. On this basis they may conclude that if evolution is true, then the belief in an all-powerful, perfectly good God must be false!

The trouble with both of these views is that they tend to invoke a completely abstract, philosophical god, not the living God of the Bible—the God who became a human being, experienced unimaginable suffering, and died in a grotesque and humiliating public display. The death of Jesus completely defied the expectations (and common sense) of his followers, as well as the expectations of any “rational” understanding of the way the Creator of the universe should act in the world. On the cross, in the person of Jesus, God took upon himself far more suffering than any creature has ever experienced.

If God himself is willing to die, particularly in such a gruesome way, then perhaps we should at least consider the possibility of God allowing the death of other creatures, too. But would this really be compatible with what we know of God through Scripture? In this essay, we will explore this quandary through a “theology of the cross”, a concept articulated by pastor George Murphy in his book Cosmos in the Light of the Cross.¹

Theology of the cross

Before we jump into the theological problems associated with evolution, let’s take a look at how we understand Christian theology itself. For the reformer Martin Luther, any theology (or science) that tries to reach knowledge of God apart from the cross is bad theology.² Instead, Luther pointed to a theologia crucis, in which the true God is seen first and foremost “through suffering and the cross”. To make his point even clearer, Luther insisted that “the CROSS alone is our theology”.³ It is the lens through which we view everything.

Of course Martin Luther, having lived in the 16th century, was not aware of the vast history of life on our planet (or any other aspect of modern science, for that matter), but George Murphy draws from Luther’s teachings the foundation that all human knowledge begins with the Word made flesh and crucified.⁴ With the cross of Christ as the ultimate framework through which we view reality, we are bound to view the processes of nature quite differently. As Murphy explains it,

A theology of the cross is an explication of belief in a God who becomes a participant in the history of the universe and thereby shares in the suffering, loss, and death that are part of worldly experience.⁵

God does not sit idly by and watch unaffected as his creatures suffer, but neither does he swoop in and make everything completely effortless and easy. Instead he chose another way, the crucifixion of Jesus—certainly not the approach that we would have preferred! The apostle Peter went so far as to try to talk Jesus out of it, but he was met with a stern rebuke (Matthew 16:21-23).

Why is evolution so disconcerting to Christians?

The problem of suffering throughout all of human history is troubling enough for us to reconcile with a loving, personal God. But in addition to that, the discovery of vast numbers of fossils reveals that death has taken place on a far greater scale than we had ever imagined. Both the wide variety of extinct creatures and their sheer numbers is quite staggering, and it raises questions about our Creator:

The picture of a God who is immune from suffering and death but who forces organisms through millions of generations and extinction is disturbing to those who believe in a God of love.⁷

The mass extinction of life on earth was already well established by the early 19th century—decades before Darwin’s research—and extinction can be empirically verified independent of any theory of evolution.⁸ The fact that the earth’s crust is a veritable graveyard of long-lost creatures is deeply troubling, and as late as the 1790’s, distinguished intellectuals such as Thomas Jefferson denied the very possibility of extinction.⁹

But in addition to the reality of species extinction, the theory of evolution by natural selection proposes that new species also arise in an environment containing widespread pain and death. Both the creatures that are now living and those that are gone are tainted by an “acrid smell of death”.¹⁰ It makes us wonder, if our Creator is not the God of the dead, but of the living (Mk. 12:27), where is God’s presence in the evolutionary picture?

In all honesty, creation through evolution is not what we would expect from God, but Scripture is full of examples in which God acts in unexpected ways. After all, God’s choosing to undergo an agonizing death on a cross is not what we would expect from the all-powerful Creator of the universe, either. In both cases, new life comes about through pain, suffering, and death. As George Murphy puts it,

A priori ideas about God have to be overcome, and God's character has to be learned from God's self-revelation.¹¹

God’s fullest self-expression is in Jesus Christ himself, one who is intimately familiar with and personally endured creaturely pain and death. The theology of the cross reveals that God's self-revelation takes place in situations of suffering, loss, and apparent hopelessness, much like situations that occur through natural selection.¹²

The crucifixion is disconcerting too

Not only is creation through evolution an unexpected and unsettling process, but so is the crucifixion of Jesus! Killing someone by hanging them on a cross is an unbearably painful, prolonged, humiliating form of death. It was such a horrific type of public execution that it wasn't until after the Roman Empire stopped the practice of crucifixion—and people no longer witnessed it personally—did the cross become a visual object of devotion.¹³ Our culture is sufficiently removed from crucifixion that we are desensitized to its original significance, but to connect it to our current context, imagine the reaction you would get by wearing jewelry designed to look like an electric chair.¹⁴

Once we are more attuned to the brutality of crucifixion, it seems all the more striking that the cross is the sign of God’s work, what George Murphy calls “the trademark of God”.¹⁵ The suffering and death of Jesus is featured prominently in the Gospels, but the crucifixion-resurrection pattern is strongly resonant within the Old Testament, too. Israel suffered and toiled as slaves in Egypt for centuries before they were rescued in the Exodus, bringing life to a people who were spiritually dead. Centuries later, the nation of Israel would experience death again when the Babylonians destroyed the Davidic monarchy, burned their Temple, killed their people, and sent many into exile.¹⁶ Neither Israel (God’s chosen people) nor Jesus (God’s own son) were spared from death and suffering; rather, suffering seems to have been the way in which God re-forms and renews humanity to fully bear His own image.

Redemption extends to all of creation

Fortunately, God’s story does not end with death. God gives new life after his creatures have been subjected to terrible circumstances. Redemption was promised to Israel itself—Ezekiel’s vision of the valley of dry bones describes how God would renew His chosen people (Ezek 37:1-14). Later, the astonishing resurrection of Jesus made salvation possible not only for Jews, but for all people in Christ (Gal 3:26-29). Ultimately, the New Testament makes it clear that God’s renewal will encompass the entire Creation:

For God was pleased to have all his fullness dwell in him, and through him to reconcile to himself all things, whether things on earth or things in heaven, by making peace through his blood, shed on the cross. (Colossians 1:19-20)

With all wisdom and understanding, he made known to us the mystery of his will according to his good pleasure, which he purposed in Christ, to be put into effect when the times reach their fulfillment—to bring unity to all things in heaven and on earth under Christ. (Ephesians 1:8-10)

Christians are accustomed to thinking of the death of Christ in regard to humans, but our culture rarely acknowledges God plan for the redemption of His entire creation. This is partly attributable to the fact that discussions of creation and origins are often separated from the topic of salvation.¹⁷ In doing so we tend to marginalize Jesus as we argue about Genesis. Rather than fall into this trap, if we view nature through a theology of the cross, we will see Christ as both the alpha and the omega point in discussions of life’s history and life’s future. With this perspective, we are more apt to sense our solidarity with the rest of creation as we wait in eager anticipation of a glorious future:

The creation waits in eager expectation for the children of God to be revealed. For the creation was subjected to frustration, not by its own choice, but by the will of the one who subjected it, in hope that the creation itself will be liberated from its bondage to decay and brought into the freedom and glory of the children of God. (Romans 8:19-21)

Conclusion

As part of the Church’s conversation about the problem of natural evil, this essay is meant to be a brief introduction to a “theology of the cross”. One can explore this concept in greater detail in Murphy’s book The Cosmos in the Light of the Cross. While there is a lot more to be said, let me conclude with the following observation: though evolution may not be compatible with some interpretations of Christianity, evolutionary creation is certainly compatible with the crucified Christ and the theology of the cross. In the person of Jesus, God suffers with the world and ultimately redeems it. As George Murphy puts in, “The world's pains are God's stigmata.”¹⁸

Explore this Topic Further

• Miller, Keith. “And God saw that it was good”: Death and Pain in the Created Order. BioLogos series
• Murphy, George L. The Cosmos in the Light of the Cross. Harrisburg, PA: Trinity Press, 2003.
• Murphy, George L. “Cross, Evolution, and Theodicy: Telling It Like It Is”. In The Evolution of Evil. Edited by G. Bennett, M.J. Hewlett, T. Peters, and R.J. Russell. Göttingen: Vandenhoeck & Ruprecht, 2008.
• Southgate, Christopher. The Groaning of Creation: God, Evolution, and the Problem of Evil. Louisville, KY: Westminister John Knox Press, 2008.

Notes

1. Murphy, George L. The Cosmos in the Light of the Cross. Harrisburg, PA: Trinity Press, 2003.
2. Murphy, p34
3. “CRUX Sola Est Nostra Theologia,” in D. Martin Luthers Werke, Kritische Gesammtausgabe (Weimar: Hermann Boehlau, 1892), 5:172. The captitalization is in the original. Cited in Murphy, p26.
4. Murphy, p108
5. Murphy, p4
6. Murphy, p43
7. Murphy, p3
8. Some Christians ascribe animal death to some combination of Adam’s fall and Noah’s flood, but this does not resolve the problem that the animals are still suffering and dying through no fault of their own. See Keith Miller’s BioLogos series Death and Pain in the Created Order for the limitations inherent in a fall-based theodicy.
9. Rudwick, Martin. The meaning of fossils: Episodes in the history of paleontology. Chicago, University of Chicago Press, 1985.
10. See Jeff Schloss’ BioLogos essay Evolution, Creation, and the Sting of Death
11. Murphy, p63
12. Murphy, p122
13. Murphy, p27
14. This example is drawn from an evangelical outreach event held by a Christian student group in Innsbruck, Austria. On campus one day, they started conversations with their classmates by asking the question, “Would you wear an electric chair on your neck?”
15. Murphy, George L. The Trademark of God: A Christian Course in Creation, Evolution, and Salvation. Wilton, Conn.: Morehouse-Barlow, 1986.
16. Murphy, Cosmos in the Light of the Cross, p 31-32.
17. Murphy, p35
18. Murphy, p87

My valiant helper, a small-sized tiger
Sleeps sweetly on my desk, by the computer,
Unaware that you insult his tribe.

Cats play with a mouse or
with a half-dead mole.
You are wrong, though: it’s not out of cruelty.
They simply like a thing that moves.

For, after all, we know that only consciousness
Can for a moment move into the Other,
Empathize with the pain and panic of a mouse.

And such as cats are, all of Nature is.
Indifferent, alas, to the good and the evil.
Quite a problem for us, I am afraid.

Natural history has its museums,
But why should our children learn about monsters,
An earth of snakes and reptiles for millions of years?

Nature devouring, nature devoured,
Butchery day and night smoking with blood.

And who created it? Was it the good Lord?

Yes, undoubtedly, they are innocent,
Spiders, mantises, sharks, pythons.

We are the only ones who say: cruelty.

Our consciousness and our conscience
Alone in the pale anthill of galaxies
Put their hope in a humane God.

Who cannot but feel and think,

Who is kindred to us by his warmth and movement,

For we are, as he told us, similar to Him.

Yet if it is so, then He takes pity
On every mauled mouse, every wounded bird.
Then the universe for him is like a Crucifixion.

Such is the outcome of your attack on the cat:
A theological, Augustinian grimace,
Which makes difficult our walking on this earth.

–Czeslaw Milosz,¹
 translated by the author and Robert Hass

The Problem

The poem above communicates in a very poignant and profound way the essence of the theological problem of death, pain, and suffering in the natural world—what has been referred to as “natural evil.” As we will see, it may also point to at least one aspect of a Christian response.

I have become convinced that one of the fundamental issues underlying much of the resistance of many Christians to an ancient, evolving creation is that of the problem of “natural evil.” “Natural evil” is also very often a primary focus of those who reject a personal and compassionate God, as it was for Darwin himself. The issue of theodicy thus seems not only to drive many people of Christian faith away from an acceptance of the conclusions of modern science, but also to drive members of the scientific community away from a serious consideration of the claims of the Christian faith. The topic is important, then not because its solution is central to the validity of the Christian faith, but because it often serves as an unnecessary stumbling block to a productive engagement of both science and faith.

The tension generated by our understanding of God’s character, as revealed in the Bible, and by the reality of the natural world around us has been the focus of much theological and philosophical debate within the Christian church since the first century. This article sets out to examine critically several of the proposed solutions to this problem, viewing them from the perspective of a geologist, paleontologist, and orthodox evangelical Christian.

The theological problem of death and pain emerges from the following propositional statements:

1. Scripture consistently declares the absolute goodness of God and the very goodness of his creation. Furthermore, Scripture declares God’s love and care for creation, and the glory and praise it returns to him.
2. Scripture also confesses a transcendent God who is omnipotent in power, yet immanent in creation as well. God’s creative activity is not described as being confined to some past event at the beginning of time, but as a present and continuing reality. God upholds creation in its being from moment to moment, and is creatively active in its history. This understanding of God’s relationship to creation has been well articulated by Jürgen Moltmann.²
3. In seeming conflict with these confessions of God’s character, we observe death, pain, and suffering as ubiquitous, even integral, aspects of the creation around us.

The apparent conflict between God’s goodness and the presence of pain and suffering is made especially acute when we consider the nonhuman creation.³ How can we accommodate the death and suffering of animals within a theology that declares both God’s omnipotence and goodness? C. S. Lewis forcefully puts the issue before us in his book The Problem of Pain:

The problem of animal suffering is appalling; not because the animals are so numerous ... but because the Christian explanation of human pain cannot be extended to animal pain. So far as we know beasts are incapable either of sin or virtue: therefore they can neither deserve pain nor be improved by it.⁴

Because the issue of animal pain so directly impacts our understanding of the goodness of creation, I will focus particularly on solutions to the problem as posed by Lewis.

How do we then reconcile the goodness of God who is immanent and active in his creation with the death, pain, and suffering we see embedded within it? There seem to be two basic alternative approaches to this dilemma.⁵

1. Natural evil can be attributed to something independent of God and acting against his will. This position threatens to limit God’s power and freedom.
2. Natural evil can be considered a part of God’s good purpose for creation, and either directly willed or permitted by him. Such a view would seem to bring into question God’s goodness and love for his creatures.

The tension between these alternatives—and efforts to avoid their negative theological consequences—surface in many of the proposed solutions to this problem.

In part 2, we start to look at some of the proposed solutions, beginning with the idea that a perfect creation was corrupted by a fall.

Notes

1. This poem was included in a collection of poems that was one of two works by Czeslaw Milosz mentioned in a review article by Michael Ignatieff, “The Art of Witness,” New York Review of Books (March 23, 1995). I thank Carol Regehr for bringing my attention to this work.
2. Moltmann refers to this aspect of God’s creative activity in history as “continuous creation.” Jürgen Moltmann, God in Creation (Minneapolis, MN: Fortress Press, 1993), 206–14.
3. I will not address here arguments concerning the degree to which animals experience pain. This issue is considered by Robert Wennberg in “Animal Suffering and the Problem of Evil,” Christian Scholar’s Review 21 (1991): 120–40. It is obvious to me that, for many animals at least, pain and suffering are a very real conscious experience.
4. C. S. Lewis, The Problem of Pain (New York: Macmillan Publishing, 1962), 129.
5. As stated by John Hick, in Evil and the God of Love, rev. ed. (New York: HarperCollins Publishers, 1977): “For every position that maintains the perfect goodness of God is bound either to let go the absolute divine power and freedom, or else to hold that evil exists ultimately within God’s good purpose” (pp. 149–50).

In Part 2 of this series, we concluded by noting that, as Christian geologists willing to consider the possibility, we find no compelling evidence that the earth’s geological features can be explained by a global Flood. Here we consider three lines of evidence: global salt deposits, the order of deposition of sediment layers in the Grand Canyon, and the sequence of fossils in geological strata.

Salt Deposits

There are many places around the earth with layers of salt, some thousands of feet in thickness. Just off the southern coast of the United States in the Gulf of Mexico, thick salt deposits sit beneath thousands of feet of sediment (Fig. 1). These deposits lie within the layers that are said to have been deposited by the Flood.

We understand how salt beds form. At locations such as the Bonneville Salt Flats of Utah, or at the Dead Sea at the border of Israel and Jordan, salt is actively forming. Salt beds form when water is evaporated. During evaporation, the concentration of dissolved ions increases until the water cannot hold the salt in solution anymore and mineral salt begins to form. If a presently unknown or poorly understood process could produce salt without evaporation, as argued by young-earth advocates¹, it would quickly dissolve as soon as it came into contact with flood water, just as the salt from your saltshaker rapidly dissolves when added to water or moist food.

One might argue that the waters from the Flood could have evaporated to leave behind the salt deposits we see today, but there is a serious problem. The thousands of feet of sediment on top of the salt is also said to be from the Flood, meaning the flood waters cannot have evaporated to produce the salt and still be present and violent enough to transport thousands of feet of sediment to the same location. In other words, a single flood cannot be called upon to explain both the salt and the overlying sediment. For those who wish to argue that natural processes could have been vastly different during the Flood, there are at least two replies. First, under such a scenario, there is no point in Flood Geology studies any more than in normal studies, for nothing could be gained by the study of unknowable processes. A more important question, however, would be to ask why God would alter natural processes just to make Flood sediments look like they are not flood sediments. What would the purpose be? (We will revisit this thought later.)

Grand Canyon: Order of Deposition

The Grand Canyon is made up of a sequence of layers that defies any reasonable attempt to explain by a single flood. The alternating layers of limestone, sandstone and shale each form in unique environments. If these deposits were formed at different times under various sea-level stages, it is quite simple to explain the different grain sizes and rock types as a function of depth and distance from the shore line. If explained with a single catastrophic flood that abided by God’s natural laws of physics and chemistry, logic must be stretched beyond the breaking point.

As a very simple observation, consider instructions given in virtually every gardening book. A good soil will have a mix of sand, silt and clay. To determine the quality of your soil, you take a handful or two, put it in a clear container, add water and shake it up. When you stop shaking, the coarse grained material will settle out first resulting in a sequence of layers: sand on the bottom, then silt, then clay. You can readily see how much of each you have by the thickness of each layer.

This is informative of what we see in flood deposits. As moving flood waters slow down, finer and finer grained sediment settles out resulting in a “fining upward” sequence. If most of the Grand Canyon layers were laid down by the Flood, then we should see the same thing – a “fining upward” sequence. Instead, we see a series of alternating layers of fine and coarse grained material, with smaller-scale alternating layers within the larger ones (Fig. 2). Increasing the violence of a flood does nothing to negate the standard order of deposition. Repeated surging of flood waters across the surface likewise offers little explanatory power; in this case we might expect successive layers, each with their own “fining upward” sequence, but such is not what is observed. Further, the Grand Canyon includes multiple layers of limestone, which are never found in flood deposits of any magnitude. Even in floods as massive as one thought to have catastrophically deluged the once dry Mediterranean Sea basin with thousands of feet of water – limestone beds are conspicuously absent.

Fossil Sequence

If a massive flood were responsible for the fossil record, what would we expect to see? If the Flood was violent enough to rip chunks of rock up from the earth and move entire continents (standard Young Earth claims)², then it should be obvious that life forms from every imaginable niche would be tumbled and mixed together (Fig. 3a). We should find numerous examples of mammoths mixed with triceratops, and pterodactyls mixed with sparrows. Ferns and meadow flowers should be found in the same deposits, along with trilobites and whales. Further, we should find all major life forms still living today, for Genesis 7:8-9 is clear in stating that all terrestrial animals were preserved on the ark.

What we actually observe is far different (Fig. 3b). There is an orderly sequence where trilobites only occur in very old rocks, dinosaurs in later beds, and mammoths in still later layers. Organisms like flowers and ferns are present together in more recent deposits, but only ferns with no flowers are found in older deposits. Some readers will recognize this as an example from the “geologic column” and be tempted to discount it as a fabrication. For those thinking this way, consider what Henry Morris had to say in both editions of Scientific Creationism:

“Creationists do not question the general validity of the geologic column, however, at least as an indicator of the usual order of deposition of the fossils…”⁵

If we revisit the Grand Canyon for a moment, is it not striking that there is not a single dinosaur, mammoth or bird in the entire exposed sequence? Not one. To find these, you have to go to younger sediments found in deposits outside the canyon that have not been fully eroded away yet. How could such a lack of mixing be possible if the Flood was violent enough to move continents?

Some implications and conclusions of Theistic Evolution--continued

(4) Several leading TEs have advanced a strongly Christocentric theology of creation—stressing the idea (from the prologue of John’s gospel) that the Maker of heaven and earth is the crucified and resurrected second person of the Trinity. Especially when theodicy is the topic, they like to speak about “the crucified God,” or “the theology of the cross,” or “divine kenosis.”

On first glance, some readers might be a bit perplexed: isn’t this column supposed to be about evolution, not the crucifixion? What could those topics possibly have in common? The answer lies in theodicy, or the problem of evil and suffering in the world. As I stressed in my column about the YEC view, creationism is ultimately about theodicy—it’s not only about theodicy, to be sure, but the belief that animals must not have suffered and died before Adam and Eve committed the first sin is crucial to the “young” in Young Earth Creationism. To a significant degree, Theistic Evolution is also about theodicy. In one of the best books on science and religion that I could name, Catholic theologian John Haught explains the atheist’s view of theodicy (which he does not share) as follows:

“Evolution is incompatible with any and all religious interpretations of the cosmos, not just with Christian fundamentalism. The prevalence of chance variations, which today are called genetic ‘mutations,’ definitively refutes the idea of any ordering deity. The fact of struggle and waste in evolution decisively demonstrates that the cosmos is not cared for by a loving God. And the fact of natural selection is a clear signal of the loveless impersonality of the universe.” (Science and Religion: From Conflict to Conversation, p. 52)

Proponents of TE have responded to the issues raised in the latter two sentences in a variety of ways. I agree with Christopher Southgate’s analysis of the overall situation. Like several of the writers I mention this week, Southgate is a theologian with a doctorate in science; he’s also an accomplished poet. The text he wrote with many others, God, Humanity and the Cosmos: A Textbook in Science and Religion, is really much more than a textbook. I recommend it for anyone seeking a wide-ranging introduction to the principal issues.

Southgate and his collaborators see just two “possible theologies of divine action in respect of evolution,” considering that “the problems of theodicy are severe.” Option ONE: “to posit God merely as the passive, suffering companion of every creature, a view self-consistent but dubiously faithful to the Christian tradition.” Option TWO: “to mount a defence of teleological creation using a combination of [certain] theological resources,” namely these three—

• “we must adopt a very high doctrine of humanity and suppose that indeed humans are of very particular concern to God.” This is linked with the Incarnation.
• “we must take very seriously the cross as costly to God, as part of God’s hugely costly way of taking responsibility for the creative process.”
• “we must give some account of the redemption of the non-human creation …” This is linked with the Trinity. (p. 279 in first edition, 1999)

Given limited space, I’ll focus almost exclusively on the second idea, though we may want to discuss all of them below.

The Crucified God

View of the entrance to the main camp of Auschwitz (May 1945). The gate bears the motto, "Arbeit Macht Frei" (Work makes one free). United States Holocaust Memorial Museum (Source).

We start with something that arose in a context entirely unrelated to evolution, Jürgen Moltmann’s (read more here and here) notion of The Crucified God. The theological point and the emotional impact of Moltmann’s conception is aptly captured in this stark passage, written in response to Elie Wiesel’s dark story of a child who was publicly hanged at Auschwitz: “like the cross of Christ, even Auschwitz is in God himself. Even Auschwitz is taken up into the grief of the Father, the surrender of the Son and the power of the Spirit.” (p. 278) A recent sermon by Matt Bates, pastor of Centenary United Methodist Church in Richmond, fleshes this out for us in a very accessible way; please read the whole sermon before going any further.

Repeat: please read the sermon. It’s a vital part of what I’m trying to say.

Now that you see more clearly what the “Crucified God” is about, let’s see what John Polkinghorne says about it:

“This profound and difficult thought meets the problem of suffering at [the] level which its deep challenge demands. The insight of the Crucified God lies at the very heart of my own Christian belief, indeed of the possibility of such belief in the face of the way the world is. But this can only really be so if God is indeed truly present in that twisted figure on the tree of Calvary. Only an ontological Christology is adequate to the defence of God in the face of human suffering. God must really be there in that darkness.” (Belief in God in an Age of Science, p. 44)

Be sure to notice two things in this passage. First, Polkinghorne confesses that his own Christian faith depends on such a conception of God, but there are only two very brief references to evolution in the entire eloquent chapter from which I’ve quoted. There’s plenty of science there, but almost all of it is modern physics, not biology. (I’ll leave it as an exercise to “students” to get a copy of this excellent little book and fill in the blanks.) In other words, evolution doesn’t shape Polkinghorne’s theology nearly as much as his theology shapes his view of evolution.

The second thing to notice is that in the last three sentences Polkinghorne is doing something subtle, but extremely important—something that I don’t want anyone to miss. Contrary to some of the most influential voices in the science and religion “dialogue” (some examples would be Haught, Ian Barbour, and the late Arthur Peacocke), Polkinghorne affirms the full divinity and humanity of Christ, in a classical Chalcedonian sense. Read those sentences again a couple of times, and you should see what I’m driving at. As he says a bit later on, “Unless there really is a God who really was ‘in Christ reconciling the world to himself’ (2 Cor. 5:19), then the cross is no answer to the bitter problem of the suffering of the world.” (p. 45) In other words, one can only take this approach to theodicy unless one actually believes in the reality of the Incarnation; only an orthodox Christian can speak meaningfully of the “Crucified God.” In the final part of this column, when I’ll present Polkinghorne as a contemporary exemplar of a theologically “orthodox” TE, it’s partly this aspect of his thought that I will have in mind.

Lucas Cranach the Elder

Finally, I should note that the term “crucified God” is not actually modern. Although Moltmann wrote an influential book about it, the language comes from Martin Luther. Another physicist-theologian, George Murphy, writes in a highly Lutheran way about The Cosmos in the Light of the Cross, advancing the view that a “theology of the cross” in which God sets aside power to become a participant in the universe, even to the point of death, takes priority over a “theology of glory,” in which we seek God first in the power behind nature, not in the powerlessness of the cross. For a short version of Murphy’s ideas, go here.

Once again, we need to stop mid-stream. These ideas are deep and perhaps too new for many readers, and it’s best to reflect on them before we go further and even deeper.

In his thoughtful, gracious, and fair-minded essay, Professor John Laing focuses on what many believers and non-believers alike recognize as perhaps the most significant challenge to faith in an all-good, -knowing, and -powerful Creator God: the problem of natural evil, and in particular, the acrid sting of death. While the issue is an ancient one, Laing—and many other contemporary commentators who range from sympathetic to antagonistic toward biblical theism—view evolution as exacerbating the problem to the point that one must choose between the good God of scripture and the truth of evolution. Although the general issue of “evolution and evil” is manifold and beyond the scope of a single essay, John (if I may), zeros in on two ways in which evolution seems to aggravate the particular theological challenge of death. First, in the view of scripture, death is “an invader, disturber of the peace, and a force of evil”; therefore its primordial (as opposed to post hoc) place in the world described by evolution seems incommensurate with an originally good creation. Second, it is not just the primordial place but also the functional role of death that appears to constitute a problem: evolution by natural selection is widely viewed as being driven by death, and more generally by fierce competition, in a way that seems hard to reconcile as a mode of creation that a wise and good God would employ.

I agree with John that these are serious issues. Little is accomplished either by glibly dismissing their prima facie legitimacy or by responding with theological concessions that relinquish core claims of the gospel. In his words: “a fundamental aspect of the good news in the Gospel is the defeat of death – this negative, destroying force – in the resurrection of Christ.” Amen! In what follows I hope to engage sequentially both issues he raises in a way that takes them seriously while avoiding compromised hope.

The Primordial Place of Death

I need to start by acknowledging that these are not just arid intellectual issues but also profoundly personal ones. I have just returned from keeping vigil at the deathbed of my father, and the sting of death is especially acute. The fact that every son sees his father die (or worse, that a parent may see a child die) –that in some sense, universal human death is part of the current “natural order” we all experience – offers no solace for the tearful remonstration of what an awful violation it is. It is a violation not just of our deepest desires, but also of what we construe to be God’s purposes, for the God of scripture is not a mere field of energy or prime mover or initial organizing principle, but is wondrously and clearly portrayed as “the living God” whose explicit purpose is that we “have life, and have it in abundance.” Indeed, in the most extensive section of his essay John cites over 40 scripture passages that affirm life as God’s intention for humanity and death as an intrusive, subverting consequence of sin. I could not be in stronger concord.

Although all Christians have traditionally affirmed resurrection (for both the redeemed and unredeemed), there have been longstanding debates about whether the life that is redemptively restored in Christ and the death that is brought about by sin is “spiritual” (involving the vitality or disruption of communion with God) or “physical” (involving the viability or dissolution of biotic function). Of course these are not mutually exclusive, and perhaps they are not even ultimately distinguishable. But however one understands death to be an incursion upon human telos, it does not answer or even clearly bear upon the evolution-related question of whether other living beings beyond and before humans were created to be immortal. “Violence” in western thought has often been understood as a disruption of natural ends: but do we assume that all creatures share the same “natural end”? For instance, is the nature or telos of worms immortality? Is death a violation of all creaturely natures that was therefore absent from earth prior to initial human intimacy with and subsequent estrangement from God? Significantly, not a single one of the scriptures John cites explicitly refers or even vaguely alludes to the general place of death in the natural order: virtually every one emphatically focuses on death as a consequence of sin for uniquely human moral agents, and—correspondingly—on eternal life as God’s special purpose for supernaturally redeemed humanity.¹ Indeed, I am at a loss to find in the entire Bible a scripture that clearly teaches death across the entire biotic realm postdates and is a consequence of human sin.² Neither is this point affirmed or even mentioned in the most prominent historic creeds of Christian orthodoxy.

Davis Young & Ralph Stearley’s The Bible, Rocks, and Time (2008, Inter Varsity Press) provides an expansive historical survey.

Yet none of this means that there is not an issue here. The view that death in all creation is not endemic but followed from a recent human fall was—with the exception of Aquinas and a few others—the dominant perspective of the church fathers, key reformers, and most Christians through the 17th Century (see sidebar). However, by the same token, so was geocentrism and so was the doctrine of human exceptionalism. Virtually all Christians have relinquished geocentrism in light of utterly compelling scientific evidence along with the recognition—in part motivated but not dictated by findings of science—that no clear and persistent scriptural teaching or core theological doctrine is compromised by this view.³ On the other hand, the claim of exceptionalism continues to be affirmed by many Christians – including myself – in light of important theological commitments and ongoing scientific discussion.

So is the primordial nature of death more like geocentrism, or more like human exceptionalism? Scientifically, there is little question that it is more akin to geocentrism. Over the last three centuries the empirical evidence for and the explanatory fruitfulness of the view that earth’s biota and death’s existence vastly predate the origin of humans have increased explosively—arguably to an extent beyond any other finding of science. Amongst tens of thousands of natural scientists, there is virtually unanimous agreement on this point.⁴ I should be clear that this is not an ad hominem argument: to say the evidential and demographic situation is similar to geocentrism is not in itself to claim that the “recent death” position is wrong. Nor is it an ad populum argument: neither John nor I have space to assess scientific evidence for this claim, and the fact that the overwhelming majority of Christian and non-Christian scientists have for several centuries shared the “primordial death” view does not make it true. But it does mean that if that view is to be rejected for the kinds of theological reasons that John raises, it seems there should be unambiguous scriptural warrant for that rejection. Failing that, then there needs to be a compelling theological rationale and a decided lack of plausible alternatives posited by fellow orthodox Christians.

I have already agreed with John that the Bible persistently presents death as an enemy of God’s purposes for humanity. But I have suggested (perhaps altogether wrongly!) that he does not provide clear scriptural evidence for death being a comparable enemy to and intrusion upon God’s purposes for all creatures. A faithful reading of the Bible does not seem to be incompatible with seeing death as part of the magisterial history of life as depicted by evolution and other natural sciences.

With these considerations of the biblical text as background, tomorrow I’ll describe why I do not believe that John or those with kindred perspectives provide a compelling theological mandate for this view of death, either.

Notes

1. There are a few scriptures not cited by John, which deal with the absence of carnivory (though not death itself) in images of idyllic creation. Genesis 1:30 portrays a world in which every creature with the breath of life had plants for food. And the images of the new earth in Isaiah 11 and 65 paint a renewal of this order in redeemed creation. Interestingly however, they do not portray an elimination of death for animals, or even for humanity. According to Is 65, the passage which presents the beautiful image of the lion and lamb: “ ‘Never again will there be in it an infant who lives but a few days, or an old man who does not live out his years; the one who dies at a hundred will be thought a mere child; the one who fails to reach a hundred will be considered accursed. They will build houses and dwell in them; they will plant vineyards and eat their fruit. No longer will they build houses and others live in them, or plant and others eat. For as the days of a tree, so will be the days of my people… The wolf and the lamb will feed together, and the lion will eat straw like the ox, and dust will be the serpent’s food. They will neither harm nor destroy on all my holy mountain,’ says the LORD.” This and other eschatological passages in scripture have a history of widely varying interpretations, but taken most literally, it describes a world with prolonged life in which there is still death (he who dies a centenarian will be like a child, and most people will live as long as trees), and in which death, however, is not inflicted by one creature upon another.
2. Although commentators differ over whether the Pauline description of death in Romans 5 refers to spiritual and/or physical death, the passage clearly focuses on humans. It identifies humanity as the subject of infection, instigated and promulgated by initial and ongoing human sin: “in this way death came to all people, because all sinned” (Romans 5:12).
3. Not all Christians have relinquished geocentrism. For example, a well-known public advocate is Dr. Gerardus Bouw, who has a Ph.D. in astronomy and until recently taught at Baldwin-Wallace Christian College. He founded the Association for Biblical Astronomy and authored an apologetic monograph for a stationary earth: Geocentricity (1992, Association for Biblical Astronomy). A crucial commitment of Dr. Bouw is that he “assumes that whenever the two [the Bible and astronomy] are at variance, it is always astronomy—that is, our ‘reading’ of the ‘Book of Nature,’ not our reading of the Holy Bible—that is wrong.” (http://www.geocentricity.com/ accessed 8/1/2012). Note that this epistemic framework asserts not just that the Bible is a more perfect witness to theological truth than nature, but that human understanding – “our reading” – of the Bible is somehow more immune to error than our reading of nature. The Bible itself does not clearly teach that humans, in our frailty, are less vulnerable to misunderstanding special than general revelation. The difference between faith in the scriptures and faith in our understanding of the scriptures is important though not always recognized, and underlies much tension in faith-science issues.
4. To his credit, even the most prominent critic of primordial death cited by John acknowledges this evidential and demographic claim. In a moving autobiographical essay, Kurt Wise acknowledges “I accepted the Word of God and rejected all that would ever counter it, including evolution. With that, in great sorrow, I tossed into the fire all my dreams and hopes in science.” Although he believes in the viability of searching for a scientific rationale, he affirms “I am a young-age creationist because that is my understanding of the Scripture. As I shared with my professors years ago when I was in college, if all the evidence in the universe turned against creationism, I would be the first to admit it, but I would still be a creationist because that is what the Word of God seems to indicate.” [Kurt Wise, in John F. Ashton (ed)., In Just Six Days. 2001. Master Books. Page 355.]

When scientists investigate God’s creation, they find that humans appear very late in the history of life. The fossil record shows that many creatures died long before humans appeared. In fact, many entire species went extinct millions of years ago (the dinosaurs are the most famous example), long before humans lived or sinned.

See “What does the Fossil Record Show?” and “How are the ages of the Earth and universe calculated?”

Yet God’s revelation in scripture paints a different picture. Several key scripture passages teach that death is a consequence of sin, including Genesis 2:16-17, Genesis 3:19,22, Romans 5:12-21, and 1 Corinthians 15. How should we think about these passages in light of the scientific evidence? Could animals have died before human sin? Does “death” in these passages refer to physical death, or spiritual death, or sometimes one and sometimes the other? To ponder these questions, we need to consider God’s revelation in scripture and God’s revelation in nature. The scientific evidence is discussed in other Questions, as are the topics of the fall and sin (see sidebars). Here we consider what scripture says about death and how the two revelations might be reconciled.

See “How does original sin fit with evolutionary history?”

Animal Death

The Bible passages that teach about sin and death are clearly referring to the death of humans. Do these passages also refer to animals? Thomas Aquinas (1225-1274) didn’t think so. He believed that God’s original creation included animals that killed each other, writing that “the nature of animals was not changed by man’s sin.”¹ Pastor Daniel Harrell makes a logical argument for animal death, writing that “there had to be death in the Garden, otherwise Adam would have been overrun by bugs and bacteria long before he took that forbidden bite of fruit.”² Animal death is also necessary to maintain population levels in a balanced ecosystem (see below for more). Some Bible passages portray predatory animals as part of God’s original plan for creation (Job 38:39-41, 39:29-30, Psalm 104:21,29). Other passages speak of the “lion laying down with the lamb” instead of killing the lamb (Isaiah 11:6-7, Isaiah 65:25), but these verses refer to the future kingdom of God, not the original creation. While animal death and suffering raises other theological questions (see Sidebar), it does not contradict Biblical teaching about death as a consequence of sin.

See “How does the evil and suffering in the world align with the idea of a loving God?”

Human death: physical or spiritual?

One traditional interpretation of Genesis 2-3 is that sin results in physical death. Humans would have been immortal without sin. In Genesis 2:17, God warns Adam and Eve, “But of the tree of the knowledge of good and evil you shall not eat, for in the day that you eat you shall die.” In Genesis 3:19, God carries out this punishment, cursing Adam with labor and death, “By the sweat of your brow you will eat your food until you return to the ground, since from it you were taken; for dust you are and to dust you will return.” In 1 Corinthians 15 Paul contrasts and compares Christ and Adam, highlighting Adam’s fall as the cause of physical death for the whole human race.

John Calvin, however, suggested that Adam’s sin caused the abrupt painful death that we experience today, a wrenching apart of the physical and spiritual aspects of humans. Calvin seems to have thought that if Adam had not sinned, a more gentle kind of physical death or “passing” from life into life would have occurred: “Truly the first man would have passed to a better life, had he remained upright; but there would have been no separation of the soul from the body, no corruption, no kind of destruction, and, in short, no violent change.”³ In this view, humans were created mortal, but intended for long healthy lives and graceful deaths, such as described in Isaiah 65:20-25. The Old Testament speaks of death at the end of a long life in purely positive terms, such as 1 Chronicles 29:28 where King David “died at a god old age, having enjoyed long life, wealth, and honor.”

Another interpretation of these passages is that the consequence of sin is spiritual death, not physical death. If Adam had not sinned, humans would still have died like we do today, but without “the sense of loss, uncertainty about an afterlife, … and regret for unfinished work” that comes with spiritual death.⁴ Agemir de Carvalho Dias, Presbyterian pastor and teacher of the Evangelical College of Parana, Brazil, writes that “the death that entered the world with Adam is understood as something that takes man apart from God, a spiritual death, in the sense that the access to God is now closed and can be restored only through faith.”⁵ Of course some sins still bring about physical death, such as Abel’s death at Cain’s hand, and the death of King David’s infant son after the king’s adultery (2 Samuel 12:13-14).

The text of Genesis 2-3 can support an interpretation of the curse as spiritual death. In the curse of Genesis 3:19, God tells Adam “for dust you are and to dust you will return,” implying that Adam was created mortal from the dust. God warned Adam and Eve that they would die in the day they ate from the tree, and yet Adam lived to the age of 930 (Genesis 5:5). What did happen on the day they ate from the tree? Adam and Eve felt shame and were expelled from the Garden, breaking their fellowship with God – spiritual death.

Weren’t Adam and Eve immortal, created as perfect ideal human beings? This is a popular idea, but not clear in the Biblical text. The first humans are described as “very good” and pleasing to God (Genesis 1:30-31), but not as perfect or with superhuman abilities. Also, consider the Tree of Life. God planted this tree in the garden before the fall (Genesis 2:9) and it gives immortality to the one who eats it (Genesis 3:22). If God created humans as immortal, what was the purpose of the Tree of Life? It would only be needed if humans were mortal to begin with.⁶

Pastor Stephen Rodeheaver reflects on the two trees of Genesis 2-3 and the implications for us today (blog series)

In the New Testament, Paul writes much on the relationship between sin and death. Sometimes Paul was clearly referring to spiritual death (Romans 6:1-14, 7:11), and other times clearly to physical death (1 Corinthians 15:35-42). Yet even in 1 Corinthians 15, Paul writes of the eternal life in Christ as something much more than the mere earthly life we experience now, implying that “death” also refers to much more than mere physical death. This is more explicit in Romans 5:12-21 where death is contrasted with the gifts of grace, justification, and righteousness, i.e. the new spiritual life provided by Jesus’ victory.

See “Were Adam and Eve Historical Figures?” which discusses the issue of death and the identity of Adam and Eve

For more, be sure to read the full FAQ "Did death occur before the Fall?" in our Questions section!

Notes

1. Saint Thomas Aquinas. Summa Theologica, Part 1, Question 93, Article 1 (web article)
2. Daniel Harrell. “Death’s Resurrection”, BioLogos Forum, December 18, 2009 (blog)
3. John Calvin. Commentaries on the First Book of Moses, called Genesis, trans. by John King. ch3 v19 (p. 97).
4. George Murphy “Human Evolution in Theological Context” BioLogos scholarly essay which includes a discussion of human and animal death (PDF), p. 6
5. Quoted by Marcio Antonio Campos in “Did peace and love reign in the world before the original sin?” BioLogos Forum, March 7, 2011 (blog)
6. See Deborah and Loren Haarsma, “Three interpretations of the Tree of Life”, supplemental material to Origins: Christian Perspectives on Creation, Evolution, and Intelligent Design (Grand Rapids, MI: Faith Alive Christian Resources) 2011 (PDF)
]]> Wed, 08 Aug 12 05:00:49 -0700 http://biologos.org/blog/series/asa-gray-and-charles-darwin-discuss-evolution-and-design?utm_source=RSS_Feed&utm_medium=RSS&utm_campaign=RSS_Syndication http://biologos.org/blog/series/asa-gray-and-charles-darwin-discuss-evolution-and-design?utm_source=RSS_Feed&utm_medium=RSS&utm_campaign=RSS_Syndication Many Christians believe that they face a painful choice-- either life was designed by God or it is an evolutionary product of natural selection. Charles Darwin himself believed in this dichotomy, and people ever since have felt the need to "choose sides". However, looking back at history, we find that one of Darwin's chief scientific colleagues, Asa Gray, did not share this perspective. In this three-part essay, part 1 charts the relationship of Asa Gray and Charles Darwin. Part 2 describes Darwin's struggle with the problem of natural evil and design in nature, and part 3 explores how Asa Gray was able to embrace evolution without rejecting the idea of design.

Evangelical Christians in the nineteenth century were generally not biblical literalists, nor did they believe in a young earth. In other words, the religious opposition to Darwin did not arise from perceived problems between Darwin's theory and a literal reading of Genesis. Rather, following the publication of Origin of Species, it centered on what seemed to be the randomness of natural selection, the appearance of new organisms by chance, and therefore the exclusion of divine purpose or design in Nature.⁷ It was the teleological question that Gray addressed in his review and about which he and Darwin corresponded over many years.

Darwin responds to Gray's review of Origin of Species

Darwin's response to Gray's review, a copy of which he received prior to its publication, was very positive. Darwin even hoped that it could become a preface in a second American edition of On the Origin of Species on which Gray worked. In a letter later in the year to James Dwight Dana, Darwin said: "No one person understands my views & has defended them so well as A. Gray;--though he does not by any means go all the way with me."⁸ The "all the way" included teleology, and Darwin wrote this to Gray concerning his attempt to retain design:

It has always seemed to me that for an Omnipotent & Omniscient Creator to foresee is the same as to preordain; but then when I come to think over this I get into an uncomfortable puzzle something analogous with "necessity & Free-will" or the "Origin of evil," or other subject quite beyond the scope of the human intellect.⁹

Three months later he picked up the discussion with these comments:

With respect to the theological view of the question; this is always painful to me.--I am bewildered.--I had no intention to write atheistically. But I own that I cannot see, as plainly as others do, & as I should wish to do, evidence of design & beneficence on all sides of us. There seems to me too much misery in the world. I cannot persuade myself that a beneficent & omnipotent God would have designedly created the Ichneumonidae with the express intention of their feeding within the living bodies of caterpillars, or that a cat should play with mice. Not believing this, I see no necessity in the belief that the eye was expressly designed. On the other hand I cannot anyhow be contented to view this wonderful universe & especially the nature of man, & to conclude that everything is the result of brute force. I am inclined to look at everything as resulting from designed laws, with the details, whether good or bad, left to the working out of what we may call chance. Not that this notion at all satisfies me .... But the more I think the more bewildered I become; as indeed I have probably shown by this letter.¹⁰


"I cannot persuade myself that a beneficent & omnipotent God would have designedly created the Ichneumonidae with the express intention of their feeding within the living bodies of caterpillars, or that a cat should play with mice." - Charles Darwin

Darwin invokes William Paley

Shortly after this letter to Gray, Darwin wrote Charles Lyell on the same subject and said:

I have said that natural selection is to the structure of organised beings, what the human architect is to a building. The very existence of the human architect shows the existence of more general laws; but no one in giving credit for a building to the human architect, thinks it necessary to refer to the laws by which man has appeared. No astronomer in showing how movements of Planets are due to gravity, thinks it necessary to say that the law of gravity was designed that the planets should pursue the courses which they pursue.--I cannot believe that there is a bit more interference by the Creator in the construction of each species, than in the course of the planets.--It is only owing to Paley & Co, as I believe, that this more special interference is thought necessary with living bodies.¹¹

In mentioning "Paley & Co," Darwin was referring to William Paley and other natural theologians, who had argued that nature--through the organization and adaptations of living organisms--demonstrated the existence of an intelligent creator. Darwin had studied Paley while in university, and Gray had also been influenced by the work of Paley, whose eighteenth-century opus Natural Theology was an important component of nineteenth-century American philosophy and was still used as a text at Harvard when Gray began teaching there in 1842.


William Paley

Paley's Argument from Design ultimately boiled down to this:

Premise 1: God's will is for us to be happy in this life and the next.

Premise 2: We can discover God's will either by consulting Scripture or by consulting "the light of nature." Both ways will lead to the same conclusion.

Premise 3: The will of God with regard to any action can be found by inquiring into its "tendency to promote or diminish the general happiness."

Conclusion 1: God creates to promote the general happiness of all creatures.

Conclusion 2: Organisms are perfectly adapted to their environment by the Creator.

The corollary of this last conclusion was that perfect design, from the structure and functioning of an organ to the structure of the universe, is evidence for God.

Confronting the reality of suffering and death in nature

For Paley, Nature provided the evidence for the existence of God, but Darwin had difficulty with this argument. His difficulty centered on what might best be referred to as issues surrounding theodicy, i.e., are natural selection and its results consistent with design by a benevolent God or do they imply that, if designed, God is capable of malevolent intent. In a July 3, 1860, letter to Gray, Darwin explicitly raises the issue. He writes:

One word more on "designed laws" & "undesigned results." I see a bird which I want for food, take my gun & kill it, I do this designedly.--An innocent & good man stands under tree & is killed by flash of lightning. Do you believe (& I really should like to hear) that God designedly killed this man? Many or most person do believe this; I can't & don't.--If you believe so, do you believe that when a swallow snaps up a gnat that God designed that that particular swallow should snap up that particular gnat at that particular instant? I believe that the man & the gnat are in same predicament.--If the death of neither man or gnat are designed, I see no good reason to believe that their first birth or production should be necessarily designed. Yet, as I said before, I cannot persuade myself that electricity acts, that the tree grows, that man aspires to loftiest conceptions all from blind, brute force.¹²

What Darwin wanted was Design without suffering, teleology without agony, purpose without pain.

Darwin and Gray discuss Design

This issue becomes the focus of discussion following the third article of a series that Gray published in The Atlantic Monthly in July, August, and October of 1860. When these articles were reprinted as a chapter in Gray's Darwiniana, the chapter was titled "Natural Selection not Inconsistent with Natural Theology." The passage that focused the discussion for Darwin was this: "We should advise Mr. Darwin to assume, in the philosophy of his hypothesis, that variation has been led along certain beneficial lines."¹³

After stating that the article was "admirable," Darwin responded to Gray in these words:

But I grieve to say that I cannot honestly go as far as you do about Design .... [Y]ou lead me to infer that you believe "that variation has been led along certain beneficial lines."--I cannot believe this; & I think you would have to believe, that the tail of the fan-tail was led to vary in the number & direction of its feathers in order to gratify the caprice of a few men.¹⁴

In September, Darwin responded to a question from Gray and informed him of his correspondence with Lyell on the subject of Design. In a lengthy passage, he wrote:

Your question of what would convince me of Design is a poser. If I saw an angel come down to teach us good, & I was convinced, from others seeing him, that I was not mad, I should believe in design. If I could be convinced thoroughly that life & mind was in an unknown way a function of other imponderable forces, I should be convinced.... I have lately been corresponding with Lyell, who, I think, adopts your idea of the stream of variation having been led or designed. I have asked him (& he says he will hereafter reflect & answer me) whether he believes that the shape of my nose was designed. If he does, I have nothing more to say. If not, seeing what Fanciers have done by selecting individual differences in the nasal bones of Pigeons, I must think that it is illogical to suppose that the variations, which Nat. Selection preserves for the good of any being, have been designed. But I know that I am in the same sort of muddle (as I have said before) as all the world seems to be in with respect to free will, yet with every supposed to have been foreseen or preordained.¹⁵

Finally, in December, Darwin sent up the white flag, conceding that "if anything is designed, certainly Man must be; one's 'inner consciousness' (though a false guide) tells one so; yet I cannot admit that man's rudimentary mammae ... & pug-nose were designed .... I am in thick mud;--the orthodox would say in fetid abominable mud."¹⁶ From this point on, the topic is not as central in their correspondence.

Following the publication of Darwin's book on orchids, however, he asked Gray to look at the last chapter, since Darwin believed that it bore on the design question. Gray's response was found in both his review of the book and in a letter to Darwin. In his review, he praised Darwin for having "brought back teleological considerations into botany." He concluded:

We faithfully believe that both natural science and natural theology will richly gain, and equally gain, whether we view each varied form as original, or whether we come to conclude, with Mr. Darwin, that they are derived:--the grand and most important inference of design in nature being drawn from the same data, subject to similar difficulties, and enforced by nearly the same considerations, in the one case as in the other.¹⁷

Gray may have believed that Darwin "brought back teleological considerations into botany," and Darwin may have swung that way in his book on orchids, but by 1867 Darwin had definitely swung back to the other side. In his concluding remarks for The Variation of Animals and Plants Under Domestication, he wrote:

However much we may wish it, we can hardly follow Professor Asa Gray in his belief that "variation has been led along certain beneficial lines," like a stream "along definite and useful lines of irrigation." If we assume that each particular variation was from the beginning of all time preordained, then that plasticity of organisation, which leads to many injurious deviations of structure, as well as the redundant power of reproduction which inevitably leads to a struggle for existence, and, as a consequence, to the natural selection or survival of the fittest, must appear to us superfluous laws of nature. On the other hand, an omnipotent and omniscient Creator ordains everything and foresees everything. Thus we are brought face to face with a difficulty as insoluble as is that of free will and predestination.¹⁸

In Part 3, the final post in this series, Dr. Miles will explore how Asa Gray was able to embrace evolution without rejecting the idea of design in nature.

Notes

7. Following the publication of Descent of Man, a second problem arose for evangelicals, centered on how humans could be moral beings, created in the Image of God, if they were continuous with the animal kingdom. I will not be addressing that issue in this paper.
8. Charles Darwin, The Correspondence of Charles Darwin 8, 1860 (Cambridge: Cambridge University Press, 1993), 303.
9. Ibid., 106.
10. Ibid., 224.
11. Ibid., 258.
12. Ibid., 275.
13. Asa Gray, "Natural Selection not Inconsistent with Natural Theology" in Darwiniana (Cambridge, MA: The Belknap Press of Harvard University, 1963), 121-2.
14. Darwin, The Correspondence of Charles Darwin 8, 496.
15. Charles Darwin, The Correspondence of Charles Darwin 9, 1861 (Cambridge: Cambridge University Press, 1994), 267-8.
16. Darwin, The Correspondence of Charles Darwin 9, 369.
17. Cited in Darwin, The Correspondence of Charles Darwin 9, note 11, 430.
18. Charles Darwin, The Variation of Animals and Plants Under Domestication (New York: D. Appleton and Company, 1896), 428.

]]> Sat, 04 Aug 12 07:21:11 -0700 Sara Joan Miles http://biologos.org/blog/hominids-videocast?utm_source=RSS_Feed&utm_medium=RSS&utm_campaign=RSS_Syndication http://biologos.org/blog/hominids-videocast?utm_source=RSS_Feed&utm_medium=RSS&utm_campaign=RSS_Syndication This BioLogos videocast addresses the age of recently discovered hominid fossils and how scientists are able to obtain those dates. Today we present the fifth entry in our on-going BioLogos videocast series. The latest episode addresses the age of recently discovered hominid fossils and how scientists are able to obtain those dates. The script was written by biology student Joy Walters, with help from BioLogos president Darrel Falk.

For more, be sure to read our FAQs How are the ages of the Earth and universe calculated? and What scientific evidence do we have about the first humans?, as well as our recent infographic How Do We Know the Earth is Old?.

Author's Note from Joy Walters

As I mentioned in my first post, I grew up skeptical of the whole idea of evolution. One contributor to my disbelief was the lengthy timescale for the “tree of life” that was presented with the theory. I would hear, for example, that dinosaurs lived hundreds of millions of years ago, but there was no explanation of why this was true; it was just given as a fact. No one explained the methods of dating, and so I thought biologists simply estimated the ages of species to fit their preconceived notions of how long it would take for one species to emerge from another. It also seemed like the ages were periodically revised and extended farther back in time, and I figured scientists needed to manipulate numbers to make evolution plausible. This, in my mind, made the theory both unbelievable and dismissible.

Once I learned about the techniques used to date fossils, I realized that my first impressions were wrong; the ancient ages of species are scientific determinations rather than scholarly conjectures. However, I have found in recent conversations that Christians remain skeptical of old ages and the evolutionary time scale. For this reason, I wanted the videocast to address the process of fossil dating (what the methods are and why they are accurate) while focusing on cases where hominid fossils were discovered and dated using these very methods. My hope is that Believers would be informed about the evidence for human evolution and its scientific grounding.

]]> Thu, 26 Jul 12 05:00:03 -0700 Joy Walters http://biologos.org/blog/the-fossil-record?utm_source=RSS_Feed&utm_medium=RSS&utm_campaign=RSS_Syndication http://biologos.org/blog/the-fossil-record?utm_source=RSS_Feed&utm_medium=RSS&utm_campaign=RSS_Syndication There are two opposite errors which need to be countered about the fossil record: 1) that it is so incomplete as to be of no value in interpreting patterns and trends in the history of life, and 2) that it is so good that we should expect a relatively complete record of the details of evolutionary transitions within all or most lineages. The Fossil Record: Is there enough evidence ?

There are two opposite errors which need to be countered about the fossil record: 1) that it is so incomplete as to be of no value in interpreting patterns and trends in the history of life, and 2) that it is so good that we should expect a relatively complete record of the details of evolutionary transitions within all or most lineages.

What then is the quality of the fossil record? It can be confidently stated that only a very small fraction of the species that once lived on Earth have been preserved in the rock record and subsequently discovered and described by science.

A more expanded discussion of this topic can be found in Miller, K.B., 2003, “Common descent, transitional forms, and the fossil record,” IN, K.B. Miller (ed.), Perspectives on an Evolving Crreation, Wm. B. Eerdmans, Grand Rapids.

There is an entire field of scientific research referred to as "taphonomy" -- literally, "the study of death." Taphonomic research includes investigating those processes active from the time of death of an organism until its final burial by sediment. These processes include decomposition, scavenging, mechanical destruction, transportation, and chemical dissolution and alteration. The ways in which the remains of organisms are subsequently mechanically and chemically altered after burial are also examined -- including the various processes of fossilization. Burial and "fossilization" of an organism's remains in no way guarantees its ultimate preservation as a fossil. Processes such as dissolution and recrystallization can remove all record of fossils from the rock. What we collect as fossils are thus the "lucky" organisms that have avoided the wide spectrum of destructive pre- and post-depositional processes arrayed against them.

Soft-bodied organisms, and organisms with non-mineralized skeletons have very little chance of preservation under most environmental conditions. Until the Cambrian nearly all organisms were soft-bodied, and even today the majority of species in marine communities are soft-bodied. The discovery of new soft-bodied fossil localities is always met with great enthusiasm. These localities typically turn up new species with unusual morphologies, and new higher taxa can be erected on the basis of a few specimens! Such localities are also erratically and widely spaced geographically and in geologic time.

Even those organisms with preservable hard parts are unlikely to be preserved under "normal" conditions. Studies of the fate of clam shells in shallow coastal waters reveal that shells are rapidly destroyed by scavenging, boring, chemical dissolution and breakage. Occasional burial during major storm events is one process that favors the incorporation of shells into the sedimentary record, and their ultimate preservation as fossils. Getting terrestrial vertebrate material into the fossil record is even more difficult. The terrestrial environment is a very destructive one: with decomposition and scavenging together with physical and chemical destruction by weathering.

The potential for fossil preservation varies dramatically from environment to environment. Preservation is enhanced under conditions that limit destructive physical and biological processes. Thus marine and fresh water environments with low oxygen levels, high salinities, or relatively high rates of sediment deposition favor preservation. Similarly, in some environments biochemical conditions can favor the early mineralization of skeletons and even soft tissues by a variety of compounds (eg. carbonate, silica, pyrite, and phosphate). The likelihood of preservation is thus highly variable. As a result, the fossil record is biased toward sampling the biota of certain types of environments, and against sampling the biota of others.

In addition to these preservational biases, the erosion, deformation and metamorphism of originally fossiliferous sedimentary rock have eliminated significant portions of the fossil record over geologic time. Furthermore, much of the fossil-bearing sedimentary record is hidden in the subsurface, or located in poorly accessible or little studied geographic areas. For these reasons, of those once-living species actually preserved in the fossil record, only a small portion have been discovered and described by science. However, there is also the promise of continued new and important discovery.

The forces arrayed against fossil preservation also guarantee that the earliest fossils known for a given animal group will always date to some time after that group first evolved. The fossil record always provides only minimum ages for the first appearance of organisms.

Because of the biases of the fossil record, the most abundant and geographically widespread species of hardpart-bearing organisms would tend to be best represented. Also, short-lived species that belonged to rapidly evolving lines of descent are less likely to be preserved than long-lived stable species. Because evolutionary change is probably most rapid within small isolated populations, a detailed species-by-species record of such evolutionary transitions is unlikely to be preserved. Furthermore, capturing such evolutionary events in the fossil record requires the fortuitous sampling of the particular geographic locality where the changes occurred.

Using the model of a branching tree of life, the expectation is for the preservation of isolated branches on an originally very bushy evolutionary tree. A few of these branches (lines of descent) would be fairly complete, while most are reconstructed with only very fragmentary evidence. As a result, the large-scale patterns of evolutionary history can generally be better discerned than the population-by-population or species-by-species transitions. Evolutionary trends over longer periods of time and across greater anatomical transitions can be followed by reconstructing the sequences in which anatomical features were acquired within an evolving branch of the tree of life.

]]> Fri, 13 Jul 12 05:00:15 -0700 Keith Miller http://biologos.org/questions/what-scientific-evidence-do-we-have-about-the-first-humans?utm_source=RSS_Feed&utm_medium=RSS&utm_campaign=RSS_Syndication http://biologos.org/questions/what-scientific-evidence-do-we-have-about-the-first-humans?utm_source=RSS_Feed&utm_medium=RSS&utm_campaign=RSS_Syndication In recent decades, scientists have discovered more about the beginnings of humanity. The fossil record shows a gradual transition over 5 million years ago from chimpanzee-size creatures to hominids with larger brains who walked on two legs. Later hominids used fire and stone tools and had brains as large as modern humans. Fossils of homo sapiens in east Africa date back nearly 200,000 years. Humans developed hearths for fire, stone points for spears and arrows, and cave paintings by 30,000 years ago. By 10,000 years ago, humans had spread throughout the globe. Genetic studies support the same picture. Humans share more DNA with chimpanzees than with any other animal, suggesting that humans and chimps share a relatively recent common ancestor. Also, the same defective genes appear in both humans and chimps, at the same locations in the genome—an observation difficult to explain except by common ancestry. Genetics also tells us that the human population today descended from more than two people. Evolution happens not to individuals but to populations, and the amount of genetic diversity in the gene pool today suggests that the human population was never smaller than several thousand individuals. Yet all humans, of all races, are descended from this group. Humanity is one family. Coming Soon]]> Thu, 12 Jul 12 14:34:24 -0700 http://biologos.org/blog/beauty-from-the-bleak?utm_source=RSS_Feed&utm_medium=RSS&utm_campaign=RSS_Syndication http://biologos.org/blog/beauty-from-the-bleak?utm_source=RSS_Feed&utm_medium=RSS&utm_campaign=RSS_Syndication Physical death is a necessary and, perhaps, disconcerting element of the evolutionary process for many Christians. It is difficult to imagine a perfect and loving God designing such a universe where forces such as natural death and entropy operate.

Though some may believe that moving the science/faith dialogue forward is best left to scientists, scholars, and theologians, we at BioLogos recognize that our pastors play an invaluable role in the conversation. Across the globe, pastors are helping their congregations work through difficult issues of science and faith with honesty, insight, and a gentle spirit. To this end we present an ongoing series recognizing sermons (and the pastors who give them) that are helping to promote the harmony of science and faith. Today's sermon comes from Michael Gungor, a musician, founder of the musical group Gungor, and a pastor at the Bloom Church in Denver, Colorado.

Gungor’s song “Beautiful Things” emphasizes the liberating truth that God has wonderfully made beautiful things “out of the dust,” just as God makes beautiful things out of a life fully surrendered to him and buried in his love.

Beautiful Things

All this pain
I wonder if I’ll ever find my way
I wonder if my life could really change at all
All this earth
Could all that is lost ever be found
Could a garden come up from this ground at all

You make beautiful things
You make beautiful things out of the dust
You make beautiful things
You make beautiful things out of us

All around
Hope is springing up from this old ground
Out of chaos life is being found in You

You make beautiful things
You make beautiful things out of the dust
You make beautiful things
You make beautiful things out of us

Physical death is a necessary and, perhaps, disconcerting element of the evolutionary process for many Christians. It is difficult to imagine a perfect and loving God designing such a universe where forces such as natural death and entropy operated. Michael Gungor of Bloom Church in Colorado addresses this idea and offers wisdom on such a complex issue.

He highlights the words of Jesus in John 12:24 (NIV): “Very truly I tell you, unless a kernel of wheat falls to the ground and dies, it remains only a single seed. But if it dies, it produces many seeds. Anyone who loves their life will lose it, while anyone who hates their life in this world will keep it for eternal life.” In other words, death precedes true life. This statement appears self-contradictory, but there is evidence of this truth in the world around us. Gungor points to the death of cells in a human body. The death of worn-out cells makes room for new cells, keeping the body healthy. In fact, humans necessarily consume plants and animals in their diet to bring nourishment and support life. He also discusses the second law of thermodynamics: entropy. In accordance with this law, the sun continually burns itself out as it produces light and energy that supports life on earth. Thus, there is a place for natural death on this earth as it allows for the continuation of life.

In light of the New Testament and the testament of science, Gungor proposes that perhaps God is not as afraid of physical death as humans are. God is not fearful of death, knowing full well that it will not remain. It allows for growth in the present, but God has spoken of the day when all death will be destroyed forever. Revelation 21:4(NIV) affirms this truth: “He will wipe every tear from their eyes. There will be no more death or mourning or crying or pain, for the old order of things has passed away.” Chapter eight of Romans also speaks about the time when all things will be brought into the glorious freedom of the children of God—that is all things will be made new. Ultimately, life will swallow up death forever, but the current “messiness” of the process of becoming is part of God’s plan too.

(To hear the entire sermon go to this link and scroll to the sermon —“What Can We Learn About Jesus from Science? Part 2”)

]]> Sat, 04 Feb 12 07:00:37 -0800 Michael Gungor http://biologos.org/blog/evolutionary-convergence?utm_source=RSS_Feed&utm_medium=RSS&utm_campaign=RSS_Syndication http://biologos.org/blog/evolutionary-convergence?utm_source=RSS_Feed&utm_medium=RSS&utm_campaign=RSS_Syndication In today's video, Oxford physicist Ard Louis discusses the famous debate between renowned evolutionary biologists Stephen Jay Gould and Simon Conway Morris over the idea of evolutionary convergence.

Today's video is courtesy of filmmaker Ryan Pettey, director/editor of Satellite Pictures and features physicist Ard Louis.

In today's video, Oxford physicist Ard Louis discusses the famous debate between renowned evolutionary biologists Stephen Jay Gould and Simon Conway Morris. Gould believed (and wrote in his book Wonderful Life) that if the "tape" of evolution were rerun, the chance that anything like human intelligence would emerge is essentially zero. In other words, humanity is here through random accident. Gould pointed to the work of Morris and fellow scientists in their research of the Burgess Shale as evidence for this view.

However, Morris himself disagrees, pointing to what is called evolutionary convergence. As Morris notes, there are numerous examples of identical features evolving multiple times throughout the history of life independently. Morris believes that if the tape of life were replayed, we would see something like humans emerge. A Christian might say, it looks like we were planned.

Some Christians might find Simon Conway Morris' viewpoint, with its implicit teleology, more attractive. Others, perhaps motivated by a high view of providence, may find Gould's emphasis on contingency equally congenial to their faith. What do you think?

]]> Thu, 15 Dec 11 05:51:27 -0800 Ard Louis http://biologos.org/blog/evidences-for-evolution-part-2b-the-whales-tale?utm_source=RSS_Feed&utm_medium=RSS&utm_campaign=RSS_Syndication http://biologos.org/blog/evidences-for-evolution-part-2b-the-whales-tale?utm_source=RSS_Feed&utm_medium=RSS&utm_campaign=RSS_Syndication If evolution is true, whales are related to the even-toed hoofed mammals, and there should be transitional fossil forms dating from about 45 to 50 million years ago. This blog (first posted on June 28, 2010) is the third piece in a series by Darrel Falk and David Kerk. The previous entry is found here.

In our previous essay, we learned that a tree summarizing species relationships can be built using DNA information, and how we can use DNA as a “molecular clock” to date ancient events. Both of these methods have made specific predictions about the origin of whales. If evolution is true: whales are related to the even-toed hoofed mammals and should share common ancestors with them; transitional fossil forms dating from about 45 to 50 million years ago should be found which can be shown to be related to both the even-toed hoofed mammals and modern whales; whales are most closely related to modern hippos, and should share a common ancestor with them.

What other types of information might we be able to use to construct a phylogenetic tree (i.e. a family tree) of species relationships? It turns out that characteristics of body structure also can be used – for example, the presence or absence of certain bones, or the specific shapes of those bones. An advantage of using bony features is that they can be recovered from fossils, whereas DNA (with only certain limited exceptions) must come from living organisms.

We can also derive functional information from an examination of bony features. The various protrusions, bumps and knobs found on bones usually have important implications. For example, smooth rounded areas at the ends of bones allow them to fit together and move easily. The shapes of such surfaces determine which bone motions are “allowed” or “disallowed”. Consider, for example, the motion of the forearm against the upper arm at the elbow. This is a “hinge” joint, whose normal motion is defined by the shapes of the upper arm bone and one of the forearm bones, where they meet each other. You might normally exercise the action of this hinge joint when you pick up a cup of coffee, bring it to your mouth, then set it back down again. Let’s try to imagine another motion. For this exercise we first need to get our arm into the proper starting position. Place your arm at your side, bent at the elbow at a ninety degree angle, with your palm up. Now, while keeping your palm up, let’s attempt to move your arm only at the elbow (no shoulder motion – that’s cheating!). Now swing your forearm out to the side and attempt to end up with your fingers pointed directly away from your side. Most of you will not be able to do this. If you can, it’s because your shoulder is rotating in spite of yourself. This motion at the elbow is normally not allowed. Hence a careful analysis of bone shapes can allow us to infer how the bones were used. This in turn can assist us in the task of phylogenetic (evolutionary) classification of organisms. That is, we will have more confidence in the grouping together of animals in our tree diagram if corresponding bones are used functionally in the same way.

Therefore we would expect that we could use various bony features to help us examine the predictions generated by our previous look at different types of DNA data. Are there any bony features that are particularly relevant to the even-toed hoofed mammals? Well, it turns out that there are. These are mainly running animals, and there are several features of their ankle bones, which taken together define the “allowed” motions which make them efficient runners. If one takes the various ankle bones of a large group of mammals, examines them carefully to note their shapes, scores that information into a table, then uses a computer program to build a phylogenetic tree, it turns out that all the even-toed hoofed mammals are placed together. So far, so good. But what about whales? Well, now we have an obvious problem. Modern whales are very specialized, - they have flippers which correspond to the forelimbs, and they have almost no hind limbs! I say “almost” because they do have small pelvic bones, which are not attached to the rest of their skeletons. But they certainly have no ankles. This is where the fossils should come in – if evolution is true, we should expect to be able to identify transitional fossils which are ancestral to whales which contain the characteristic ankle bony features of the even-toed hoofed mammals.

Now let’s look at bony features from the whale perspective. We have already mentioned the almost complete loss of hind limbs, and the presence of forelimbs modified into flippers. In addition, as air breathers, whales have a blowhole at the top of their skull. And as powerful swimmers, which use a large tail fluke in vertical motions, whales have enormous sets of muscles which attach to enlarged projections from their vertebral column. So if evolution is true, we should begin to see fossil forms which manifest changes in bony features which correspond to the gradual accumulation of these whale-like characteristics. However, we still need more, because these various bony features all would be expected to occur in largely or exclusively aquatic forms. We might expect this to correspond to the later stages of a transition from terrestrial even-toed hoofed mammals. But what about the earlier stages? It would be very helpful if we had some “defining” characteristic of whales, similar to the ankle structure of even-toed hoofed mammals.

It turns out that the structure of the bones of the skull and ear apparatus of whales are highly modified to allow efficient hearing underwater. The mechanical aspects of efficiently receiving sound through water are somewhat different than receiving sound travelling through air. If evolution is true, we should expect to be able to find key transitional fossil forms with a progressive series of modifications of the skull and ear bones, features which would not be found in any other mammals.

Now that we know what we should expect to see, if evolution is true, let’s look at what has actually been found in the fossil record. Over the last fifteen years or so, a series of fossils, many of them discovered in the Indian subcontinent, have fulfilled nearly all of our predictions.^1,2 Let’s look at the figure below (Figure 1), reproduced from a recent popular book on evolution.³ This shows a series of fossils, arranged in approximate chronological order, with a modern whale at the top. How old are these fossil forms? The entire fossil progression illustrated occurs from a little over 50 million years ago to about 40 million years ago. So a remarkable alteration in general body form occurred in a little over 10 million years. This time frame agrees well with the previous prediction from the DNA “clock” that we discussed in our previous essay. Second, the general change in body shape corresponds to what we predicted in our discussion of whale bony features above. That is, there is a gradual elongation and streamlining, there is a modification of the forelimb into flippers and progressive reduction of the hindlimb, the nostrils for breathing move toward the top of the skull to form a blowhole (not obvious from the diagram), and the vertebrae develop enlarged projections to support the attachment of swimming muscles.



Figure 1: Skeletons and Body Forms of Modern Whales and Fossil Ancestors
The reconstructed skeletons (black) from modern whales (top) and various ancestral skeletal forms (series below) are in chronological order (from Pakicetus up). Indohyus is an extinct whale “cousin”. Relative body size, to scale, is indicated by the gray shapes at the right of each animal.

There is probably little question that the last fossil species in the figure (Durodon) is well on the way to becoming a modern whale. However, it might be argued by a skeptic that the earlier species (like Rhodocetus, Ambulocetus, or Pakicetus), despite the “cetus” (whale) part of their names, are not so obviously “whale-like” that they deserve to be considered as fossil whale ancestors. However, remember the characteristic whale skull modifications for hearing? It has been shown very clearly that throughout this series of fossil species, the various bony changes necessary to support efficient hearing in water were being acquired in a stepwise fashion. Organisms earlier in the sequence had skeletal characteristics consistent with them being able to hear well in both air (using the “classic” mammalian hearing apparatus), and newly acquired changes to also allow better hearing in water. Later organisms in the sequence become increasingly specialized for hearing in water only.⁴

What of the earliest fossil shown in this diagram –Pakicetus? Careful examination shows that it has the features we would predict for an early whale ancestor. It has the ankle bone characteristics of the even-toed hoofed mammals (in fact these features are also found in several of the later fossil forms as well, ensuring their continuity). This confirms one of the predictions made by the DNA evidence we discussed earlier. Furthermore, it has some of the modifications of the skull bones necessary for more efficient underwater hearing, which were previously documented only for modern whales and their later (more obvious) ancestors.⁴ These features are also shared with the “whale cousin” Indohyus.⁵ Preservation of more of the skeleton of this latter species has allowed detailed analysis indicating characteristics likely shared with whale ancestors. Indohyus was probably a wading animal, which spent much of its time in the water. It appears to have fed mostly on land, so it is suggested that resort to the water was made to escape predators.⁵

Finally, we need to look back at the last prediction from our previous DNA evidence, namely that modern whales are most closely related to hippos. If evolution is true, we should expect to find fossil forms linking these two modern groups. This has proven to be a tougher nut to crack, mainly because the ancestral whales first appear about 50 million years ago in what is now south Asia, and the hippo family first appears about 15 million years ago, in Africa. The most recent tree diagram, produced by using a combination of skeletal features and DNA data, still supports this family connection, as shown by the following figure (Figure 2).⁶



Figure 2: Phylogenetic Tree Showing the Relationship of Modern Whales to Living and Extinct Even-Toed Hoofed Mammals
This tree is based on both bony features and DNA data. The organisms presented in blue are semi-aquatic or aquatic forms. Organisms shown in green are terrestrial even-toed hoofed mammals (Artiodactyls). In black is shown a member of the odd-toed hoofed mammals. In red is an extinct fossil ancestor group. (This figure is adapted from Fig 1a in Reference 6).

The blue lines in the diagram show species in which the skeleton is specially thickened, and the bone structure more dense. This is an adaptation which allows wading animals (like modern hippos and the fossil Indohyus) to be good “bottom-walkers” (it prevents them from floating due to lighter body tissues), and allows fully marine organisms (like modern whales) to have “neutral buoyancy” (so they don’t always tend to pop up to the water surface, like a cork). There has also been progress in clarifying the relationships between fossil ancestors of hippos and those of modern whales. A recent study of hippo evolution, based only on skeletal characteristics, has conclusively shown that the hippo family are descended from an extinct group of fossil Artiodactyls, known to go back more than 40 million years, and whose fossils are from southern Asia. Furthermore, this study produced a phylogenetic tree predicting that this extinct hippo ancestor group also shared a common ancestor with the fossil whales.⁷ Thus the investigation of hippo origins is independently leading us back toward the origin of whales. However, in this study the statistical support for predicted common ancestor of the ancient hippo group and the ancient whale group is not as strong as scientists would like to consider this “case closed”. What is necessary is more fossils, of the appropriate age in order to complete the story of hippo evolution. We still need that to fill in the details of the predicted relationship of hippos to modern whales.

Thus the “Whales’ Tale” is not yet complete. It is a story of scientific discovery in progress. As we finish, let’s briefly summarize what we have found out. Different types of DNA evidence agree that modern whales are most closely related to the even-toed hoofed mammals, despite the obvious great changes in limb anatomy of the modern whales. This prediction has been amply confirmed by the fossil record. The DNA sequence evidence predicted a time frame during which critical early events in evolution of whale ancestors should occur. This prediction has also been amply confirmed. Finally, DNA evidence predicts that modern whales are most closely related to hippos. There is some fossil evidence supporting a predicted common ancestor, but more data is needed. A final caution to possible sceptics – this state of “unfinished business” is precisely how the scientific process works. There is no “crisis”. There is no indication that evolution is not true. There is simply the ongoing work of mapping out of various lines of evidence. A scientific conclusion is considered well supported if “all roads lead to Rome”. In the case of whale evolution it might be prudent to say that the evidence has not quite converged in Rome yet, but that we are now in the suburbs. That is precisely what makes science interesting and fun. Stay tuned!

The next blog in this series can be found here.

References:

1: Thewissen J.G.M., Williams E.M., Roe L.J. and Hussain S.T. 2001. Skeletons of terrestrial cetaceans and the relationship of whales to artiodactyls. Nature. 413: 277-281.

2: Gingerich P.D., ul Haq M., Zalmout I.S., Khan I.H., Malkani M.S. 2001. Origin of Whales from Early Artiodactyls: Hands and Feet of Eocene Protocetidae from Pakistan. Science. 293:2239-2242.

3: Coyne, J.A. 2009. Why Evolution is True. Viking Penguin, New York. Pg 50.

4: Numella S., Thewissen J.G.M., Bajpai S.,Hussain T., Kumar K. 2007. Sound Transmission in Archaic and Modern Whales: Anatomical Adaptations for Underwater Hearing. The Anatomical Record. 290:716-733.

5: Thewissen J.G.M., Cooper L.N., Clementz M.T., Bajpai S., Tiwari B.N. 2007. Whales originated from aquatic artiodactyls in the Eocene epoch of India. Nature. 450:1190-1194.

6: Geisler J.H. and Theodor J.M. 2009. Hippopotamus and whale phylogeny. Nature. 458:E1-E4.

7: Boisserie J.-R., Lihoreau F., Brunet M. 2005. The position of Hippopotamidae within Cetartiodactyla. Proceedings of the National Academy of Sciences U.S.A. 102(5):1537-1541.

]]> Sun, 27 Nov 11 23:31:20 -0800 David Kerk http://biologos.org/blog/new-limbs-from-old-fins-part-2?utm_source=RSS_Feed&utm_medium=RSS&utm_campaign=RSS_Syndication http://biologos.org/blog/new-limbs-from-old-fins-part-2?utm_source=RSS_Feed&utm_medium=RSS&utm_campaign=RSS_Syndication Critics of evolution sometimes portray the theory as an untestable historical conjecture, depicting it as fundamentally different from experimental science in the lab. But the hunt for the earliest tetrapods was an effort to test a hypothesis that had generated a prediction. In the previous post in this series, we looked at the remarkable blueprint that underlies all limbs – one bone, two bones, blobs, digits – and considered some ways we might explain it. One potential explanation is, roughly speaking, design. Perhaps the blueprint represents an idea or preference in the mind of the Creator. Perhaps the blueprint represents an optimized design, one so superior that there is no better way to build a limb. The other potential explanation is common ancestry. The blueprint was present in ancestors of the distant past, and it has been retained with modification in all tetrapod vertebrates that have descended from those pioneering ancestors. We noted that one explanation need not entirely preclude the other.

In the rest of the series, we will look closely at the evolutionary explanation for the blueprint. That explanation postulates that tetrapod limbs arose during a particular era in life's history, and that they arose as modifications of the fins of fish. And the evolutionary explanation isn't just an interesting idea. It's a comprehensive explanation – it helps us to understand bones, fossils, genes, chemical signaling systems. It provides a coherent framework for understanding why limbs are the way they are, and how they got that way.

Comparing the anatomy of tetrapod vertebrates and fish

The idea that tetrapods arose from fish is not new; E.D. Cope proposed in 1892 that tetrapods descended from lobe-finned fish. (Modern lobe-finned fishes include coelacanths and lungfish, and comprise one of two divisions of the bony fishes. The other division, the ray-finned fishes, includes most familiar kinds of fish.) In the early days, biologists inferred ancestral relationships between species largely through comparative anatomy and embryology: they would carefully classify organisms according to their structure (including their structure during development) and look for relationships that generated nested hierarchies. A simple nested hierarchy goes something like this: 1) animals with backbones; 2) animals with backbones and limbs; and 3) animals with backbones, limbs, and hair. Animals in group 3 also belong to groups 1 and 2, while animals in group 2 also belong to group 1, and so the groups together define a nested hierarchy. Such studies alone could have led some scientists to infer an ancestral relationship between fish and tetrapods, and perhaps those studies did convince them. But then there were fossils of various types of fish and other vertebrates, many long extinct. That fossil record was relatively sketchy in 1892, but it nevertheless led Cope and others to conclude that certain fish had given rise to tetrapods at a particular time in natural history.

The fossil record shows a fish-to-tetrapod transition

Here are some basic findings from the fossil record that suggest a fish-to-tetrapod transition and that have been known for decades:

• Fish, including fish with bones, lived on the earth before tetrapods appeared. Specifically, fossils of bony fish first appear in rocks from about 420 million years ago.

• Tetrapods appear in the fossil record at a particular point in history and then persist and diversify in subsequent eons. Their arrival was long thought to have occurred about 365 million years ago, although some recent findings have challenged that hypothesis.

• Tetrapods that still had some fishy features were prowling the planet 365 million years ago.

• Lobe-finned fish that were starting to look more like tetrapods were eating other fish about 385 million years ago.

Even many decades ago, there were hints that something interesting happened between 400 million years ago and 365 million years ago. Let's take a close look at the ancient animals that suggest the fish-to-tetrapod transition.

Ancient animals

The most primitive known tetrapods for which we have skeletal remains lived 365 million years ago. They were undeniably tetrapods, but there was definitely something fishy about them. (Heh heh.) One of the most famous of these creatures is Acanthostega, discovered in 1987 by British paleontologist Jennifer Clack and pictured below. Acanthostega is a card-carrying tetrapod, with fingers and toes. But it has a fish tail, with fin rays. Another well-known primitive tetrapod is Ichthyostega, which lived around the same time as Acanthostega. Like Acanthostega, it is a true tetrapod, but has several odd fish-like structural features. For example, its skull is more fish-like than that of Acanthostega. In summary, both Acanthostega and Ichthyostega already used the limb blueprint, even though both also had some fish-like anatomical characteristics. Their presence 365 million years ago shows that tetrapods must be at least that old, and their mixture of anatomical features suggests that the transition happened not long before that.



And what about the lobe-finned fish that looked a bit tetrapod-ish? That animal is Panderichthys, described as “vaguely crocodile-shaped” with skeletal features that were tetrapod-like. Specifically, this ancient fish had tetrapod-like “shoulders,” and recent analysis found some finger-like bones at the ends of the fins. The creature also had a breathing hole on the top of its head. These fish lived around 385 million years ago.

The hunt for the earliest tetrapods

Taken together, these observations suggested that the fish-to-tetrapod transition occurred between 385 and 365 million years ago. Eager to see what that transition looked like, scientists began to look for 375 million-year-old rocks in which they might find animals at the beginning of tetrapod-hood. They wanted to catch evolution in the act.

Let's stop and think about this, because it's cool and because it's important to note the extent to which evolutionary biology is hypothesis-driven. Critics of evolution sometimes portray the theory as an untestable historical conjecture, depicting it as fundamentally different from experimental science in the lab. But the hunt for the earliest tetrapods was an effort to test a hypothesis that had generated a prediction. Based on the hypothesis that lobe-finned fish were ancestors of tetrapods, scientists predicted that intermediate animals, “fishapods,” would be found in the gap between Panderichthys and Acanthostega. To evaluate the prediction, all they needed to do was find some suitable 375 million-year-old rocks.

Neil Shubin describes that search in the first chapter of Your Inner Fish. He and his colleagues found suitable rocks in the islands of the Arctic: the right age, nicely exposed (by erosion), and representative of the kind of environment that their quarry would frequent – freshwater streams. They made their biggest discovery on their last trip (“a do-or-die situation”) in 2004. That discovery was Tiktaalik roseae, the “fishapod.”

The “fishapod”

Tiktaalik roseae is one of the most extraordinary fossil intermediates ever described, and its public debut in 2006 was front-page news. An artist's conception of the animal is pictured below.



There are several aspects of the anatomy of Tiktaalik that earn it the title “fishapod.” Like a good fish, it had scales and webbed fins. Like a tetrapod (more specifically, like a crocodile), it had a flat head, with eyes on the top of the head, and it had a neck. But what about those fins? Or are they limbs? Remarkably, the answer seems to be, “both.”

The fins of Tiktaalik were part fish fin, part tetrapod limb. On the outside, they looked like fins, with webbing. On the inside, though, these fins were clearly tetrapod-like. Amazingly, the fins of Tiktaalik were built using a primitive version of the limb blueprint: one bone, two bones, blobs, digits. As Shubin writes in Your Inner Fish, “We had a fish with a wrist.” (The Tiktaalik roseae web site at the University of Chicago is a great source for images and more information.)

Let's address three questions about Tiktaalik that might have occurred to you. First, why might animals like Tiktaalik have developed tetrapod-like fins? Shubin and his colleagues suggest that these limb-like fins may have been useful for doing “push-ups” in the shallow water. (Like Panderichthys, Tiktaalik had a breathing hole on top of its head and was clearly adapted for living and moving in shallow water.) Second, is Tiktaalik an ancestor of all tetrapods? No, not necessarily. What Tiktaalik shows us is that animals were developing tetrapod features in the context of fish bodies, and Tiktaalik shows us the context (shallow water) in which this likely occurred. But that doesn't mean that our lineage arose from Tiktaalik itself. Finally, is Tiktaalik now the oldest tetrapod? No, apparently not. For one thing, Tiktaalik is truly transitional, and probably therefore not worthy of full tetrapod membership. But more notably, data published in 2010 show that tetrapods are a lot older than was thought at the time of Tiktaalik's discovery. The new findings show footprints that are unmistakably those of a tetrapod, in rocks about 395 million years old. Surprisingly, then, tetrapods were already on their way long before Neil Shubin's specimen lived. Tiktaalik is truly a fish/tetrapod intermediate, which was living at the same time as animals that were fully tetrapods. A simple story of succession, in which intermediates disappear and are replaced by less intermediate types, seems to be an oversimplification.

In conclusion, the fossil record provides evidence that the fins of fish and the limbs of tetrapods are related by ancestry: limbs seem to be modified versions of fins. What other evidence supports this proposal? In the next post, we will turn to developmental biology, and explore the meaning of the term 'homology.'

Further reading:

Neil Shubin (2009) Your Inner Fish: A Journey Into the 3.5-Billion-Year History of the Human Body. New York: Vintage Books.

Carl Zimmer (2006) A Fin is a Limb is a Wing: How Evolution Fashioned its Masterworks. Online at NationalGeographic.com.

Tiktaalik roseae website at the University of Chicago.

Jennifer Clack's website at the University of Cambridge.

Images are from Wikipedia.

]]> Fri, 16 Sep 11 04:59:54 -0700 Stephen Matheson http://biologos.org/blog/weekend-sermon-a-tales-of-two-cities?utm_source=RSS_Feed&utm_medium=RSS&utm_campaign=RSS_Syndication http://biologos.org/blog/weekend-sermon-a-tales-of-two-cities?utm_source=RSS_Feed&utm_medium=RSS&utm_campaign=RSS_Syndication This sermon is a clear reminder that we each have a choice. We can work to build cities that celebrate God’s love for us (the lineage of Seth), or we can live in the destructive lineage of Cain. May the spirit of prayer, humility, and love characterize the world’s cities on this the tenth anniversary of America’s most stark example of “The Tale of Two Cities.”

The opening chapters in Genesis omit seemingly important details, leaving one with an incomplete understanding of the situation at hand. Dr. Keller explains that ancient Biblical writers sought to convey certain truths, and, therefore, would only include facts relevant to the point of the narrative. This is true of Cain’s exile in Genesis 4: 11-26. As he explores this story, he highlights the crucial insights that the passage means to offer.

Foremost, he exposes the cause of Cain’s ruin. When Cain murders Abel, God questions him saying “Where is Abel your brother?” and “What have you done? The voice of your brother’s blood is crying to me from the ground.” God is not seeking information, but rather creating an opportunity for Cain to repent of his sin. Why is this so? Dr. Keller explains that sin results when one is self-focused, rather than God- focused. Repentance, however, goes to the root of this problem by turning one’s attention to God and others once again. It is the action of removing oneself from the center that heals the hardness and pride of the heart.

However, Cain does not repent. Instead, he complains to God that his “punishment is more than he can bear.” In other words, he is sorry for the consequences of his sin, not the sin itself. This leads to his exile from the presence of God, which is the ultimate downfall of Cain.

Next, there is evidence that Cain’s city is a “culture of death.” From the line of Cain comes a civilization marked by animal husbandry, technology, and music. In these “gardening” activities, the people indeed reflect God’s image as they creatively order the surrounding materials. However, rather than a Garden of Eden through love and service, it becomes a place marked by oppression and violence. For example, one descendant of Cain called Lamech is polygamous, having two wives. Furthermore, this man boasts saying, “I have killed a man for wounding me, a young man for injuring me—If Cain is avenged seven times, then Lamech seventy-seven times.” Their culture is now about power and exploitation. In spite of the death cultivated in this city, Dr. Keller clarifies that cities are not the issue. It is human sin alone that corrupts the city.

Finally, the scriptures point to a coming city of grace. When Cain establishes his city, he names it after himself. Without God’s presence and love, his work becomes a means of making a name for himself. However, cities are supposed to be a place where people selflessly give to one another in response to the Lord. This text shows the beginning of one such city that comes through the line of Seth, Eve’s third son. The passage states that this city is filled with a people who “call on the name of the Lord.” Thus, it is a place where people lift high the name of God. Dr. Keller explains that the Body of Christ is called to be this city of grace within the city of death. Ultimately, this power comes through the Lord Jesus Christ alone, who has poured out endless love and forgiveness and grace upon all who believe in his name.

Exactly one decade ago today, the September Eleventh terrorist attacks shocked Americans beyond belief as they watched airplanes crash into the mighty Twin Towers and Pentagon. The hearts of the people filled with grief at the aftermath of the tragedy. The Twin Towers were reduced to rubble, thousands of dearly loved individuals died, and all were crushed with heartache. In the midst of this death arose a beautiful sight and sound: millions bowing their heads in prayer, speaking words of comfort, and coming to the aid of one another. In spite of the physical deaths, New York City and the U.S. as a whole were transformed from death to life as people joined hand in hand to mourn the loss and move forward into the healing process. The pain of the losses was raw and real, but so was the love and grace that swept through, causing our divided nation to unite in unbelievable strength.

This sermon is a clear reminder that we each have a choice. We can work to build cities that celebrate God’s love for us (the lineage of Seth), or we can live in the destructive lineage of Cain. May the spirit of prayer, humility, and love characterize the world’s cities on this the tenth anniversary of America’s most stark example of “The Tale of Two Cities.”

]]> Sun, 11 Sep 11 07:54:51 -0700 Tim Keller http://biologos.org/essays/the-cambrian-explosion-transitional-forms-and-the-tree-of-life?utm_source=RSS_Feed&utm_medium=RSS&utm_campaign=RSS_Syndication http://biologos.org/essays/the-cambrian-explosion-transitional-forms-and-the-tree-of-life?utm_source=RSS_Feed&utm_medium=RSS&utm_campaign=RSS_Syndication Geologist Keith Miller examines the "Cambrian Explosion", a period of rapid evolutionary diversification approximately 575 million years ago, and whether it poses a challenge to evolutionary theory. Mon, 02 May 11 18:45:49 -0700 Keith Miller