Quote:
Originally Posted by tooblue
(Post 168533)
http://www.blog.newsweek.com/blogs/l...ind-about.aspx
"One can detect a whiff of revolution in the air. Harvard biologist Marc Hauser says he has changed his mind about “Darwinian Reasoning.” No, he has not become a creationist, but is now more skeptical of the dogmatic view that all traits are adaptive. "In recent years, I have made less use of Darwin’s adaptive logic,” Hauser writes. “It is not because I think that the adaptive program has failed, or that it can’t continue to account for a wide variety of human and animal behavior. But with respect to questions of human and animal mind, and especially some of the unique products of the human mind—language, morality, music, mathematics—I have, well, changed my mind about the power of Darwinian reasoning. . . . [W]here I have lost the faith, so to speak, is in the power of the adaptive program to explain or predict particular design features of human thought. Although it is certainly reasonable to say that language, morality and music have design features that are adaptive, that would enhance reproduction and survival, evidence for such claims is sorely missing.”
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This is certainly not new. The importance and influence of various mechanisms (natural selection, sexual selection, group selection, drift, etc.) have been hotly debated for decades. It seems obvious to me that language and morality (maybe not so much music, although I guess arguments could be made) are adaptive, but it is true that direct evidence is lacking. Various other primates are in many ways "moral," but we don't have direct evidence for how they obtained those qualities either.
Natural selection is the most important mechanism of evolution, but that doesn't mean it is responsible for the majority of our genome. I think it probably is, however.
That author's use of "dogma" and "revolution" are typically ignorant. The late Stephen J Gould, one of the most influential scientists of the last few decades, emphasized the importance of mechanisms other than natural selection in evolution. Various others have emphasized them even more than he did. Science journalism is wrong more often than not.
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