Baron de Montesquieu proposed the separation of powers into legislative, judicial, and executive branches to prevent abuse of power.
Baron de Montesquieu, a French enlightenment writer, is famous for his idea of the separation of powers and division of government into legislative, judicial, and executive branches. Montesquieu argued that these branches should be separate to prevent one from overreaching its power, as explained in his work, The Spirit of Laws (1748).
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