Charles-Louis de Secondat, Baron de la Brède and de Montesquieu was an influential French political thinker born in 1689. He is known for publishing "The Spirit of Laws" in 1748, which established the idea of separating government powers into legislative, executive, and judicial branches to better protect liberty. The Founding Fathers of the United States, especially James Madison, drew heavily from Montesquieu's theory of separated powers when drafting the US Constitution, implementing independent executive, legislative, and judicial branches at the federal level. Montesquieu's concept of separated powers remains highly influential in American politics today.