Why are some people trustworthy while others cheat and lie, some generous and others coldhearted louts? Part of the answer may lie in the hormone oxytocin. In an excerpt from The Moral Molecule, Paul J.
Zak has found a hormonal explanation for a phenomenon that lies at the heart of social behavior, and in so doing gives us a scientific rationale for engaging in social and familial activities, such as exchanging hugs, singing in groups, or just enjoying time with friends and family.
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