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A fictional social science, coined by Isaac Asimov in his Foundation series, which combines history, sociology, and mass psychology to predict the broad, statistical future of galactic civilizations across millennia. The core premise is that while individual behavior is chaotic, the reactions of human masses are predictable, like molecules in a gas. A true psychohistory would allow its practitioners to guide the future with minimal, calculated interventions, steering the course of empires as one might nudge an asteroid.
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