For groups that made this political transition to egalitarianism, there was a quantum leap in the development of moral matrices. People now lived in much denser webs of norms, informal sanctions, and occasionally violent punishments. Those who could navigate this new world skillfully and maintain good reputations were rewarded by gaining the trust, cooperation, and political support of others. Those who could not respect group norms, or who acted like bullies, were removed from the gene pool by being shunned, expelled, or killed. Genes and cultural practices (such as the collective killing of
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