  Montesquieu was one of the great political philosophers of the Enlightenment. Insatiably curious and mordantly funny, he constructed a naturalistic account of the various forms of government, and of the causes that made them what they were and that advanced or constrained their development. He used this account to explain how governments might be preserved from corruption. He saw despotism, in particular, as a standing danger for any government not already despotic, and argued that it could best be prevented by a system in which different bodies exercised legislative, executive, and judicial power, and in which all those bodies were bound by the rule of law. This theory of the separation of powers had an enormous impact on liberal political theory, and on the framers of the constitution of the United States of America.