Since then our predecessors have left this matter of legislation uninvestigated, it will perhaps be better ourselves to inquire into it, and indeed into the whole question of the management of a state, in order that our philosophy of human life may be completed to the best of our power.

Let us try, then, first of all, to consider any valuable utterances that our predecessors have made upon this or that branch of the subject; and then, looking at our collection of constitutions, let us inquire what things tend to preserve or to destroy states, and what things tend to preserve or destroy the several kinds of constitution, and what are the causes of the good government of some states and the misgovernment of others: for when we have got an insight into these matters we shall, I think, be better able to see what is the best kind of constitution, and what is the best arrangement of each of the several kinds; that is to say, what system of laws and customs is best suited to each.

Let us begin then. 261