What three types of governments dose Aristotle identify?

Aristotle identifies three main types of governments: monarchy (rule by one), aristocracy (rule by a few), and polity (rule by the many, or democracy when it devolves into a negative form). Each of these can have virtuous forms and corrupted forms—tyranny (corrupted monarchy), oligarchy (corrupted aristocracy), and democracy (when it leads to mob rule). Aristotle emphasizes the importance of balance and the common good in governance.