the human mind is prepared for tribalism. Human evolution is not just the story of individuals competing with other individuals within each group; it’s also the story of groups competing with other groups—sometimes violently. We are all descended from people who belonged to groups that were consistently better at winning that competition. Tribalism is our evolutionary endowment for banding together to prepare for intergroup conflict.29 When the “tribe switch”30 is activated, we bind ourselves more tightly to the group, we embrace and defend the group’s moral matrix, and we stop thinking for
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