City Readers Digital Historic Collections at the New York Society Library

Charles-Louis de Secondat, Baron de La Brède et de Montesquieu (/ˈmɒntᵻskjuː/; French: [mɔ̃tɛskjø]; 18 January 1689 – 10 February 1755), generally referred to as simply Montesquieu, was a French lawyer, man of letters, and political philosopher who lived during the Age of Enlightenment. He is famous for his articulation of the theory of separation of powers, which is implemented in many constitutions throughout the world. He did more than any other author to secure the place of the word despotism in the political lexicon.