Living in this niche therefore requires both individual and collective creativity, intensive cooperation, a tolerance for strangers and crowds, and a degree of openness and trust that is entirely unmatched among our closest primate relatives. Compared to fiercely individualistic and relentlessly competitive chimpanzees, for instance, we are like goofy, tail-wagging puppies. We are almost painfully docile, desperately in need of affection and social contact, and wildly vulnerable to exploitation. As Sarah Blaffer Hrdy, an anthropologist and primatologist, notes, it is remarkable that hundreds
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