According to Aristotle, which of the following is the best form of government ?

In Aristotle's six-fold classification of constitutions in Politics, 'Polity' (constitutional rule by the many in the common interest, combining elements of oligarchy and democracy and anchored in a stable middle class) is the best practicable form of government. By contrast, tyranny (perverted rule of one), oligarchy (perverted rule of the wealthy few), and extreme democracy (perverted rule of the needy many) are classified by Aristotle as deviant or perverted constitutions.