Now that the courts have protected Americans (at least for the moment) from the inculcation of compulsory “creationist” stupidity in the classroom, we can echo that other great Victorian Lord Macaulay and say that “every schoolchild knows” that Paley had put his creaking, leaking cart in front of his wheezing and broken-down old horse. Fish do not have fins because they need them for the water, any more than birds are equipped with wings so that they can meet the dictionary definition of an “avian.” (Apart from anything else, there are too many flightless species of birds.) It is exactly the other way about: a process of adaptation and selection. Let no one doubt the power of the original illusion. Whittaker Chambers in his seismic book Witness recounts the first moment when he abandoned historical materialism, mentally deserted the Communist cause, and embarked on the career which would undo Stalinism in America. It was on the morning when he glimpsed the ear of his baby daughter. The pretty whorls and folds of this external organ persuaded him in a flash of revelation that no coincidence could have created it. A fleshly flap of such utter beauty must be divine. Well, I too have marveled at the sweet little ears of my female offspring, but never without noticing that (a) they always need a bit of a clean-out, (b) that they look mass-produced even when set against the inferior ears of other people’s daughters, (c) that as people get older their ears look more and more absurd from behind, and (d) that much lower animals, such as cats and bats, have much more fascinating and lovely and more potent ears. To echo Laplace, in fact, I would say that there are many, many persuasive arguments against Stalin-worship, but that the anti-Stalin case is fully valid without Mr. Chambers’s ear-flap-based assumption.
Ears are predictable and uniform, and their flaps are every bit as adorable when the child has been born stone deaf. The same is not true, in the same sense, of the universe. Here there are anomalies and mysteries and imperfections—to use the most minimal terms—that do not even show adaptation, let alone selection. Thomas Jefferson in old age was fond of the analogy of the timepiece in his own case, and would write to friends who inquired after his health that the odd spring was breaking and the occasional wheel wearing out. This of course raises the uncomfortable (for believers) idea of the built-in fault that no repairman can fix. Should this be counted as part of the “design” as well? (As usual, those who take the credit for the one will fall silent and start shuffling when it comes to the other side of the ledger.) But when it comes to the whirling, howling wilderness of outer space, with its red giants and white dwarfs and black holes, its titanic explosions and extinctions, we can only dimly and shiveringly conclude that the “design” hasn’t been imposed quite yet, and wonder if this is how dinosaurs “felt” when the meteors came smashing through the earth’s atmosphere and put an end to the pointless bellowing rivalry across primeval swamps.
Even what was first known about the comparatively consoling symmetry of the solar system, with its nonetheless evident tendency to instability and entropy, upset Sir Isaac Newton enough to make him propose that god intervened every now and then to put the orbits back on an even keel. This exposed him to teasing from Leibniz, who asked why god couldn’t have got it working right the first time around. It is, indeed, only because of the frightening emptiness elsewhere that we are bound to be impressed by the apparently unique and beautiful conditions that have allowed intelligent life to occur on earth. But then, vain as we are, we would be impressed, wouldn’t we? This vanity allows us to overlook the implacable fact that, of the other bodies in our own solar system alone, the rest are all either far too cold to support anything recognizable as life, or far too hot. The same, as it happens, is true of our own blue and rounded planetary home, where heat contends with cold to make large tracts of it into useless wasteland, and where we have come to learn that we live, and have always lived, on a climatic knife edge. Meanwhile, the sun is getting ready to explode and devour its dependent planets like some jealous chief or tribal deity. Some design!
So much for the macro-dimension. What of the micro? Ever since they were forced to take part in this argument, which they were with great reluctance, the religious have tried to echo Hamlet’s admonition to Horatio that there are more things in heaven and earth than are dreamed of by mere humans. Our side willingly concedes this point: we are prepared for discoveries in the future that will stagger our faculties even more than the vast advances in knowledge that have come to us since Darwin and Einstein. However, these discoveries will come to us in the same way—by means of patient and scrupulous and (this time, we hope) unfettered inquiry. In the meanwhile, we also have to improve our minds by the laborious exercise of refuting the latest foolishness contrived by the faithful. When the bones of prehistoric animals began to be discovered and scrutinized in the nineteenth century, there were those who said that the fossils had been placed in the rock by god, in order to test our faith. This cannot be disproved. Nor can my own pet theory that, from the patterns of behavior that are observable, we may infer a design that makes planet earth, all unknown to us, a prison colony and lunatic asylum that is employed as a dumping ground by far-off and superior civilizations. However, I was educated by Sir Karl Popper to believe that a theory that is unfalsifiable is to that extent a weak one.
Now we are being told that astonishing features, such as the human eye, cannot be the result of, so to speak, “blind” chance. As it happens, the “design” faction have chosen an example that could not be bettered. We now know a great deal about the eye, and about which creatures have it and which do not, and why. I must here for a moment give way to my friend Dr. Michael Shermer:
Evolution also posits that modern organisms should show a variety of structures from simple to complex, reflecting an evolutionary history rather than an instantaneous creation. The human eye, for example, is the result of a long and complex pathway that goes back hundreds of millions of years. Initially a simple eyespot with a handful of light-sensitive cells that provided information to the organism about an important source of the light; it developed into a recessed eyespot, where a small surface indentation filled with light-sensitive cells provided additional data on the direction of light; then into a deep recession eyespot, where additional cells at greater depth provide more accurate information about the environment; then into a pinhole camera eye that is able to focus an image on the back of a deeply-recessed layer of light- sensitive cells; then into a pinhole lens eye that is able to focus the image; then into a complex eye found in such modern mammals as humans.
All the intermediate stages of this process have been located in other creatures, and sophisticated computer models have been developed which have tested the theory and shown that it actually “works.” There is a further proof of the evolution of the eye, as Shermer points out. This is the ineptitude of its “design”:
The anatomy of the human eye, in fact, shows anything but “intelligence” in its design. It is built upside down and backwards, requiring photons of light to travel through the cornea, lens, aquaeous fluid, blood vessels, ganglion cells, amacrine cells, horizontal cells, and bipolar cells before they reach the light- sensitive rods and cones that transduce the light signal into neural impulses—which are then sent to the visual cortex at the back of the brain for processing into meaningful patterns. For optimal vision, why would an intelligent designer have built an eye upside down and backwards?
It is because we evolved from sightless bacteria, now found to share our DNA, that we are so myopic. These are the same ill-designed optics, complete with deliberately “designed” retinal blind spot, through which earlier humans claimed to have “seen” miracles “with their own eyes.” The problem in those cases was located elsewhere in the cortex, but we must never forget Charles Darwin’s injunction that even the most highly evolved of us will continue to carry “the indelible stamp of their lowly origin.”
I would add to Shermer that, though it is true we are the highest and smartest animals, ospreys have eyes we have calculated to be sixty times more powerful a
nd sophisticated than our own and that blindness, often caused by microscopic parasites that are themselves miracles of ingenuity, is one of the oldest and most tragic disorders known to man. And why award the superior eye (or in the case of the cat or bat, also the ear) to the inferior species? The osprey can swoop accurately on a fast-moving fish that it has detected underwater from many, many feet above, all the while maneuvering with its extraordinary wings. Ospreys have almost been exterminated by man, while you yourself can be born as blind as a worm and still become a pious and observant Methodist, for example.
“To suppose that the eye,” wrote Charles Darwin,
with all its inimitable contrivances for adjusting the focus to different distances, for admitting different amounts of light, and for the correction of spherical and chromatic aberration, could have been formed by natural selection, seems, I freely confess, absurd in the highest possible degree.
He wrote this in an essay titled “Organs of Extreme Perfection and Complication.” Since that time, the evolution of the eye has become almost a separate department of study. And why should it not? It is immensely fascinating and rewarding to know that at least forty different sets of eyes, and possibly sixty different sets, have evolved in quite distinct and parallel, if comparable, ways. Dr. Daniel Nilsson, perhaps the foremost authority on the subject, has found among other things that three entirely different groups of fish have independently developed four eyes. One of these sea creatures, Bathylychnops exilis, possesses a pair of eyes that look outward, and another pair of eyes (set in the wall of the main two) that direct their gaze straight downward. This would be an encumbrance to most animals, but it has some obvious advantages for an aquatic one. And it is highly important to notice that the embryological development of the second set of eyes is not a copy or a miniature of the first set, but an entirely different evolution. As Dr. Nilsson puts it in a letter to Richard Dawkins: “This species has reinvented the lens despite the fact that it already had one. It serves as a good support for the view that lenses are not difficult to evolve.” A creative deity, of course, would have been more likely to double the complement of optics in the first place, which would have left us with nothing to wonder about, or to discover. Or as Darwin went on to say, in the same essay:
When it was first said that the sun stood still and the world turned round, the common sense of mankind declared the doctrine false; but the old saying of vox populi, vox Dei, as every philosopher knows, cannot be trusted in science. Reason tells me, that if numerous gradations from an imperfect and simple eye to one perfect and complex, each grade being useful to its possessor, can be shown to exist, as is certainly the case; if further, the eye ever slightly varies, and the variations be inherited, as is likewise certainly the case; and if such variations should ever be useful to any animal under changing conditions of life, then the difficulty of believing that a perfect and complex eye could be formed by natural selection, though insuperable by our imagination, cannot be considered real.
We may smile slightly when we notice that Darwin wrote of the sun standing still, and when we notice that he spoke of the eye’s “perfection,” but only because we are fortunate enough to know more than he did. What is worth noting, and retaining, is his proper use of the sense of what is wondrous.
The real “miracle” is that we, who share genes with the original bacteria that began life on the planet, have evolved as much as we have. Other creatures did not develop eyes at all, or developed extremely weak ones. There is an intriguing paradox here: evolution does not have eyes but it can create them. The brilliant Professor Francis Crick, one of the discoverers of the double helix, had a colleague named Leslie Orgel who encapsulated this paradox more elegantly than I can. “Evolution,” he said, “is smarter than you are.” But this compliment to the “intelligence” of natural selection is not by any means a concession to the stupid notion of “intelligent design.” Some of the results are extremely impressive, as we are bound to think in our own case. (“What a piece of work is a man!” as Hamlet exclaims, before going on to contradict himself somewhat by describing the result as a “quintessence of dust”; both statements having the merit of being true.) But the process by which the results are attained is slow and infinitely laborious, and has given us a DNA “string” which is crowded with useless junk and which has much in common with much lower creatures. The stamp of the lowly origin is to be found in our appendix, in the now needless coat of hair that we still grow (and then shed) after five months in the womb, in our easily worn-out knees, our vestigial tails, and the many caprices of our urinogenital arrangements. Why do people keep saying, “God is in the details”? He isn’t in ours, unless his yokel creationist fans wish to take credit for his clumsiness, failure, and incompetence.
Those who have yielded, not without a struggle, to the overwhelming evidence of evolution are now trying to award themselves a medal for their own acceptance of defeat. The very magnificence and variety of the process, they now wish to say, argues for a directing and originating mind. In this way they choose to make a fumbling fool of their pretended god, and make him out to be a tinkerer, an approximator, and a blunderer, who took eons of time to fashion a few serviceable figures and heaped up a junkyard of scrap and failure meanwhile. Have they no more respect for the deity than that? They unwisely say that evolutionary biology is “only a theory,” which betrays their ignorance of the meaning of the word “theory” as well as of the meaning of the word “design.” A “theory” is something evolved—if you forgive the expression—to fit the known facts. It is a successful theory if it survives the introduction of hitherto unknown facts. And it becomes an accepted theory if it can make accurate predictions about things or events that have not yet been discovered, or have not yet occurred. This can take time, and is also subject to a version of Ockham’s pro- cedure: Pharaonic astronomers in Egypt could predict eclipses even though they believed the earth to be flat: it just took them a great deal more unnecessary work. Einstein’s prediction of the precise angular deflection of starlight due to gravity—verified during an eclipse off the west coast of Africa that occured in 1919—was more elegant, and was held to vindicate his “theory” of relativity.
There are many disputes between evolutionists as to how the complex process occurred, and indeed as to how it began. Francis Crick even allowed himself to flirt with the theory that life was “inseminated” on earth by bacteria spread from a passing comet. However, all these disputes, when or if they are resolved, will be resolved by using the scientific and experimental methods that have proven themselves so far. By contrast, creationism, or “intelligent design” (its only cleverness being found in this underhanded rebranding of itself) is not even a theory. In all its well-financed propaganda, it has never even attempted to show how one single piece of the natural world is explained better by “design” than by evolutionary competition. Instead, it dissolves into puerile tautology. One of the creationists’ “questionnaires” purports to be a “yes /no” interrogation of the following:
Do you know of any building that didn’t have a builder?
Do you know of any painting that didn’t have a painter?
Do you know of any car that didn’t have a maker?
If you answered YES for any of the above, give details.
We know the answer in all cases: these were painstaking inventions (also by trial and error) of mankind, and were the work of many hands, and are still “evolving.” This is what makes piffle out of the ignorant creationist sneer, which compares evolution to a whirlwind blowing through a junkyard of parts and coming up with a jumbo jet. For a start, there are no “parts” lying around waiting to be assembled. For another thing, the process of acquisition and discarding of “parts” (most especially wings) is as far from a whirlwind as could conceiv- ably be. The time involved is more like that of a glacier than a storm. For still another thing, jumbo jets are not riddled with nonworking or superfluous “parts” lamely inherited from less successful aircraft. Why
have we agreed so easily to call this exploded old nontheory by its cunningly chosen new disguise of “intelligent design”? There is nothing at all “intelligent” about it. It is the same old mumbo-jumbo (or in this instance, jumbo-mumbo).
Airplanes are, in their human-designed way, “evolving.” And so, in a quite different way, are we. In early April 2006 a long study at the University of Oregon was published in the journal Science. Based on the reconstruction of ancient genes from extinct animals, the researchers were able to show how the nontheory of “irreducible complexity” is a joke. Protein molecules, they found, slowly employed trial and error, reusing and modifying existing parts, to act in a key-and-lock manner and switch discrepant hormones “on” and “off.” This genetic march was blindly inaugurated 450 million years ago, before life left the ocean and before the evolution of bones. We now know things about our nature that the founders of religion could not even begin to guess at, and that would have stilled their overconfident tongues if they had known of them. Yet again, once one has disposed of superfluous assumptions, speculation about who designed us to be designers becomes as fruitless and irrelevant as the question of who designed that designer. Aristotle, whose reasoning about the unmoved mover and the uncaused cause is the beginning of this argument, concluded that the logic would necessitate forty-seven or fifty-five gods. Surely even a monotheist would be grateful for Ockham’s razor at this point? From a plurality of prime movers, the monotheists have bargained it down to a single one. They are getting ever nearer to the true, round figure.
We must also confront the fact that evolution is, as well as smarter than we are, infinitely more callous and cruel, and also capricious. Investigation of the fossil record and the record of molecular biology shows us that approximately 98 percent of all the species that have ever appeared on earth have lapsed into extinction. There have been extraordinary periods of life explosion, invariably succeeded by great “dyings out.” In order for life to take hold at all on a cooling planet, it had first to occur with fantastic profusion. We have a micro-glimpse of this in our little human lives: men produce infinitely more seminal fluid than is required to build a human family, and are tortured—not completely unpleasantly—by the urgent need to spread it all over the place or otherwise get rid of it. (Religions have needlessly added to the torture by condemning various simple means of relieving this presumably “designed” pressure.) The exuberant teeming variety of insect life, or sparrow or salmon or codfish life, is a titanic waste that ensures, in some but not all cases, that there will be enough survivors.