Showing posts with label Darwin. Show all posts
Showing posts with label Darwin. Show all posts

Wednesday, August 10, 2011

Charles Darwin on the Creator

Occasionally in Origin of Species Darwin mentions God, in ways that seem in some sense to defend his character. For instance, there's this quote from Chapter V:
He who believes that each equine species was independently created, will, I presume, assert that each species has been created with a tendency to vary, both under nature an under domestication, in this particular manner, so as often to become striped like the other species of the genus; and that each has been created with a strong tendency, when crossed with species inhabiting distant quarters of the world, to produce hybrids resembling in their stripes, not their own parents, but other species of the genus. To admit this view is, as it seems to me, to reject a real for an unreal, or least for an unknown, cause. It makes the works of God a mere mockery and deception; I would almost as soon believe, with the old and ignorant cosmogonists, that fossil shells had never lived, but had been created in stone so as to mock the shells living on the seashore.
And then there's this (rather lengthy) quote from Chatper VI, which comes in the middle of explaining how the eye may be the product of incremental changes:
It is scarcely possible to avoid comparing the eye with a telescope. We know that this instrument has been perfected by the long-continued efforts of the highest human intellects; and we naturally infer that the eye has been formed by a somewhat analogous process. But may not this inference be presumptuous? Have we any right to assume that the Creator works by intellectual powers like those of man? If we must compare the eye to an optical instrument, we ought in imagination to take a thick layer of transparent tissue, with spaces filled with fluid, and with a nerve sensitive to light beneath, and then suppose every part of this layer to be continually changing slowly in density, so as to separate into layers of different distances from each other, and with the surfaces of each layer slowly changing in form. Further we must suppose that there is a power, represented by natural selection of the survival of the fittest, always intently watching each slight alteration in the transparent layers; and carefully preserving each which, under varied circumstances, in any way or in any degree, tends to produce a dinstincter image. We must suppose each new state of the instrument to be multiplied by the million; each to be preserved until a better one is produced, and then the old ones to be all destroyed. In living bodies, variation will cause the slight alterations, generation will multiply them almost infinitely, and natural selection will pick out with unerring skill each improvement. Let this process go on for millions of years; and during each year on millions of individuals of many kinds; and may we not believe that a living optical instrument might thus be formed as superior to one of glass, as the works of the Creator are to those of man?
Adam Smith showed how the market may be the product of human action, but not of human design. Darwin showed how biological evolution may be the product of divine action, but not of divine design.

Charles Darwin on "Chance"

Although the theory of evolution is now progressed far beyond Darwin's original work On the Origin of Species, I thought it would be interesting to read through it, for historical perspective, and to round out my education (I never did learn very much biology). I'm not finished, but a couple of things have caught my eye that I wanted to write down.

Many people take issue with Darwinism based on the general idea that it promotes chance over design, thus making the universe out to be chaotic and purposeless. But that's not how Darwin himself wrote about it. Chapter V is framed by the following statements:
I have hitherto sometimes spoken as if the variations--so common and multiform with organic beings under domestication, and in a lesser degree with those under nature--were due to chance. This, of course, is a wholly incorrect expression, but it serves to acknowledge plainly our ignorance of the cause of each particular variation.

...

Our ignorance of the laws of variations is profound. Not in one case out of a hundred can we pretend to assign any reason why this or that part has varied. But whenever we have the means of instituting a comparison, the same laws appear to have acted in producing the lesser differences between varieties of the same species, and the greater differences between species of the same genus.
In other words, we only perceive natural selection as due to "chance" because it occurs in systems of so many constituent parts that we cannot possibly know how they all relate to one another. Or better, "chance" is simply an expression of our ignorance, not nature's chaos.

Darwin's assumption is a very modern one: there must be some underlying principles which are both comprehensible to humans and universally applicable to what humans perceive in nature as distinct objects. Creationism, by contrast, asserts that the existence of the several species is fundamentally inexplicable: God spoke, and the species came into being, and that's as far as we can go. I consider both of these ways of thinking to be in tension throughout the history of Judeo-Christian thought. On the one hand, God's inexplicable intervention into history is central to the message of Scripture, particularly on Mount Sinai and at the resurrection of Christ. On the other hand, God's faithfulness, sovereignty, and wisdom are also essential parts of his character, and creation is thus characterized as fundamentally driven by principles which are comprehensible to human beings.

Can we therefore say that Darwin's idea is thoroughly unbiblical? True, it goes beyond the creation account in Genesis, as some would say attempting to see the "story behind the story." But if one were to completely forbid this kind of attempt from Christian thought, would we not have to give up all talk of the Triune existence of God, seeing that we do not ever see this explicitly spelled out in Scripture? Indeed, most Christians see the Trinity in the first few lines of Genesis: the Spirit is present in the "wind," and the Son is present as the Word of God speaking all things into existence (cf. John 1). Is this not also an example of seeing the "story behind the story"?

One final point: discovering the underlying principle does by no means remove all mystery from the universe. Even in light of modern genetics, there is no way we will ever be able to predict the long-run outcomes of evolution, as it is driven by countless tiny variations of which we will never be fully aware; much less can we possibly conceive of their future use. Because the process is so far beyond our control, we may thus call it a matter of "chance," but only if we are so inclined for reasons other than the facts themselves.