Final answer:
Baron de Montesquieu introduced the concept of the separation of powers to prevent concentration of power within a single branch of government.
Explanation:
Baron de Montesquieu theorized the concept of separation of powers, advocating for distinct branches of government - legislative, executive, and judicial - to prevent one branch from becoming too powerful. This principle is enshrined in the U.S. Constitution to ensure a system of checks and balances.
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