Joshua Greene > Quotes > Quote > Farha liked it

“Cooperation evolves only if individuals who are prone to cooperation outcompete individuals who are not (or who are less so). Thus, if morality is a set of adaptations for cooperation, we today are moral beings only because our morally minded ancestors outcompeted their less morally minded neighbors. And thus, insofar as morality is a biological adaptation, it evolved not only as a device for putting Us ahead of Me, but as a device for putting Us ahead of Them. (And”
― Joshua Greene, Moral Tribes: Emotion, Reason, and the Gap Between Us and Them