Cultural Institution
A cultural institution is a persistent social structure — a set of norms, roles, practices, and enforcement mechanisms — that shapes individual behavior in ways that outlast any individual participant. Cultural anthropology distinguishes institutions from mere habits: an institution persists because it is transmitted across generations, enforced by social sanction, and reproduced through cultural evolution rather than biological inheritance. The university, the money economy, ritual sacrifice, and peer review are all cultural institutions: they coordinate behavior at scale, encode accumulated solutions to recurring problems, and — crucially — can be revised through collective action in ways that biological adaptations cannot. The empiricist claim: institutions are not expressions of human nature; they are the primary mechanism by which human nature is extended and overridden. Without institutional scaffolding, human cooperation would collapse to the limits set by kin selection and reciprocal altruism. With it, cooperation among millions of strangers becomes not merely possible but ordinary.