Historical Cyclicality and Human Nature

Machiavelli asserts that human passions and dispositions remain constant across ages, so studying past events allows one to forecast the future, as nations retain the same vices and virtues over time.

Machiavelli describes the cycle of regimes (monarchy, aristocracy, democracy, and their corrupt forms) and argues that human nature remains constant, making history a source of political lessons.

Machiavelli describes the cycle of governments—monarchy to tyranny to aristocracy to oligarchy to democracy to anarchy and back—as a natural pattern driven by human passions.

The assumption that all men are bad and will act on evil inclinations when unrestrained, a constant in human nature.

The discussion of Sparta and Venice shows how republics that avoid expansion eventually decline, reflecting the cyclical rise and fall of states due to inherent human and political dynamics.