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American religious leader and politician who led the Mormon exodus, founded Salt Lake City, and served as the second president of the LDS Church and first governor of Utah Territory

American statesman and determined opponent of slavery who served as Secretary of State during the Civil War and negotiated the Alaska Purchase

Belgian physicist and mathematician known for inventing the phenakistiscope, an early device that demonstrated the illusion of moving images

French classical liberal theorist, political economist, and member of the French assembly, known for his writings on free markets and limited government