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" "We do not inhabit a perfected world where natural selection ruthlessly scrutinizes all organic structures and then molds them for optimal utility. Organisms inherit a body form and a style of embryonic development; these impose constraints upon future change and adaptation. In many cases, evolutionary pathways reflect inherited patterns more than current environmental demands. These inheritances constrain, but they also provide opportunity. A potentially minor genetic change […] entails a host of complex, nonadaptive consequences. The primary flexibility of evolution may arise from nonadaptive by-products that occasionally permit organisms to strike out in new and unpredictable directions. What “play” would evolution have if each structure were built for a restricted purpose and could be used for nothing else? How could humans learn to write if our brain had not evolved for hunting, social cohesion, or whatever, and could not transcend the adaptive boundaries of its original purpose?
Stephen Jay Gould (September 10, 1941 – May 20, 2002) was an American geologist, paleontologist, evolutionary biologist and popular-science author, who spent most of his career teaching at Harvard University and working at the American Museum of Natural History in New York. He was one of the most influential and widely read writers of popular science of his generation.
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If the resident zoologist of Galaxy X had visited the earth 5 million years ago while making his inventory of inhabited planets in the universe, he would surely have corrected his earlier report that apes showed more promise than Old World monkeys and noted that monkeys had overcome an original disadvantage to gain domination among primates. (He will confirm this statement after his visit next year—but also add a footnote that one species from the ape bush has enjoyed an unusual and unexpected flowering, thus demanding closer monitoring.)
A proper understanding of biology and culture both affirms the great important of biology in human behavior and also explains why biology makes us free. The old equation of biology with restriction, with the inherent (as opposed to the malleable) side of the false dichotomy between nature and nurture, rests upon errors of thinking as old as Western culture itself. The critics of biological determinism do not uphold the equally fallacious (and equally cruel and restrictive) view that human culture cancels biology. Biological determinism has limited the lives of millions by misidentifying their socioeconomic disadvantages as inborn deficiencies, but cultural determinism can be just as cruel in attributing severe congenital diseases, autism for example, to psychobabble about too much parental love, or too little.
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