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Thursday 27 August 2015

Yet more on the ancient roots of Darwinism

The Ancient Philosophical Roots of Darwinism

Six centuries before the Christian era (B.C.E.), the Greek philosopher Anaximander asserted that the first living things emerged from formless matter and then underwent transmutations to produce a wide variety of forms. In what some commentators regard as a primitive form of evolutionary theory, Anaximander apparently held that humans descended from some other species of animal -- probably a fish.48 In the fifth century B.C.E., the Greek philosopher Empedocles taught that the chance interplay of earth, air, fire and water produced disconnected organs and limbs that wandered aimlessly about until they combined spontaneously to make whole creatures. Most of the resulting combinations were monstrosities -- with faces and breasts on the back as well as front, or half ox and half human -- that were so maladapted that they perished. Among the few that survived were creatures that eventually developed into modern humans.49

Leucippus and Democritus in the fifth century B.C.E. and Epicurus in the fourth century B.C.E. advocated a materialistic philosophy in which no gods exist -- only atoms and the void.50 In the first century B.C.E., the Roman philosopher Lucretius immortalized this view in his long poem “On the Nature of Things.” Book Five begins with an attack on religion and teleology, then it lays out a theory of survival of the fittest that is remarkably similar to Darwin’s. Although Lucretius did not suggest that all living things are descended from a common ancestor, he believed that all things -- including living organisms and human beings -- are products of aimless interactions among atoms. If they are well adapted to their environment, they survive and leave descendants; if not, they perish.51

Some modern followers of Charles Darwin regard these ancient thinkers as their intellectual forebears. According to a 1996 statement on a pro-evolution web site maintained by the University of California at Berkeley, “evolutionary theory begins” with Anaximander. Although his ideas “drew on the religious and mythical ideas of his time, he was still one of the first to attempt an explanation of the origin and evolution of the cosmos based on natural laws.” Thus Anaximander’s theory “bears some resemblance to evolutionary theory.” According to the same web site Empedocles proposed a theory that “seems a bit bizarre today” but was nevertheless “a sort of evolutionary theory: Past natural selection is responsible for the forms we see today. Empedocles also ascribed the origin of the life of today to the interplay of impersonal forces, in which chance, not the gods, played the major role.” Thus the Greeks “led the way in developing a general scientific worldview -- one in which natural, non-miraculous explanations for the causes of phenomena were sought.”52

Of course, there were differences between the ideas of the ancient Greeks and modern evolutionary theory, but they were similar in one fundamental respect: They attributed cosmic and biological origins to unguided natural processes rather than divine design. As modern evolutionary biologist Ernst Mayr put it, the ancient Greek theories “constitute the first scientific revolution, so to speak, a rejection of supernatural in favor of materialistic explanations.”53

For Mayr and the author of the Berkeley evolution web site, and for other followers of Charles Darwin, “science” is synonymous with “materialistic explanation.” In this respect, they are following in the footsteps of ancient materialistic philosophers.

This is why modern controversies over evolution are not really about empirical science. Although many of Darwin’s followers believe that he presented overwhelming evidence for his theory, nothing could be further from the truth. The Origin of Species is just warmed-over materialistic philosophy, decorated with illustrations borrowed from nineteenth-century science.

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