Like all careful thinkers who have contemplated the human condition, Marc Hauser does not argue that either nature or nurture acts alone. Indeed, in his new book, Moral Minds, he explicitly states that morality results from both influences working together. The variations between societies in how people make moral judgments highlight the role of nurture, whereas the many similarities between cultures reflect the hand of nature. This much is clear from just about any introductory anthropology class, but Hauser wants to bring us farther along the road to understanding what it means to be a moral species.
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