The Classical GreekphilosopherPlato discusses five types of regimes (Republic, Book VIII). They are Aristocracy, Timocracy, Oligarchy, Democracy, and Tyranny. Plato also assigns a man to each of these regimes to illustrate what they stand for. The tyrannical man would represent Tyranny for example. These five regimes progressively degenerate starting with Aristocracy at the top and Tyranny at the bottom.