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Kin selection theory is one of the great theories in the history of science. It places human beings within an explanatory framework that embraces the rest of the biological world – a framework that links suicidal nest defense in bees and patterns of root growth in plants with the loving bonds and quiet self-sacrifice found in human families. I’m willing to go out on a limb and say that no psychologist or social scientist who lacks a detailed understanding of kin selection theory, and an awareness of the importance of relatedness throughout the living world, can claim to be an expert on behavior. Furthermore, any student of psychology or the social sciences who isn’t taught Hamilton’s ideas in some depth has been short-changed and should immediately ask for a refund.”
― The Ape that Understood the Universe: How the Mind and Culture Evolve
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Most women go through menopause between the ages of forty-five and fifty-five, after which their baby-making days are over. Men, on the other hand, can in principle keep making babies till the day they die. Put simply, women have a narrower window of fertility than men. And that’s why men have evolved to put more weight than women on a partner’s youthfulness: Youthfulness is a more important indicator of fertility in women.”
― The Ape that Understood the Universe: How the Mind and Culture Evolve
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