"The Great Books Reading and Discussion Program group met to discuss 'Principles of Government,' an excerpt from Baron de Montesquieu’s most influential book The Spirit of the Laws published anonymously in 1748. Montesquieu was a French Enlightenment thinker who is credited with first expressing the theory of the separation of powers, the foundation of the U.S. Constitution. Other discussion topics included natural law, monarchy, virtue, slavery, revolutions, and democracy."at BookTV on C-SPAN 2
See Montesquieu, Great Books of the Western World (first edition, 52 Vol., 1952) volume 38, (second edition, 60 Vol., 1990) volume 35.