The Social Identity Theory of Intergroup Behavior.

Adaptation

Adaptation marks moral life responding to conditions that will not wait—scarcity, violence, scale, displacement. In Before Certainty Arrives, what begins as adaptation can outlive the pressures that first made it necessary. It helps preserve workable coordination under constraint, but can fail when adaptive tools are mistaken for permanent moral truth. It differs from inheritance because adaptation names responsive change; inheritance names what gets carried forward after conditions shift. It differs from drift because adaptation is active response; drift is gradual decoupling while machinery still runs.

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