Polybius and the Founding Fathers: the separation of powers

Abstract

Polybius, a Greek historian, propounded the theory of mixed constitution in his Histories. His theory suggests that simple forms of government (monarchy, aristocracy, and democracy) eventually degenerate into their respective corrupt forms due to hereditary succession. Polybius believed that a mixed constitution, comprising elements of all three simple forms, could prevent this degeneration. Several Founding Fathers, including Thomas Jefferson, James Madison, and John Adams, were familiar with Polybius’s work and incorporated aspects of his theory into the framing of the U.S. Constitution. While Montesquieu is often credited with introducing the concept of separation of powers to the Founders, his ideas largely stem from Polybius and other classical sources. Therefore, Polybius’s influence on the U.S. Constitution and the role of Montesquieu as a conduit of classical political thought should be acknowledged. – AI-generated abstract.