Any kind of intergroup conflict (real or perceived) immediately turns tribalism up, making people highly attentive to signs that reveal which team another person is on. Traitors are punished, and fraternizing with the enemy is, too. Conditions of peace and prosperity, in contrast, generally turn down the tribalism.32 People don’t need to track group membership as vigilantly; they don’t feel pressured to conform to group expectations as closely. When a community succeeds in turning down everyone’s tribal circuits, there is more room for individuals to construct lives of their own choosing;
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