Our main task today is to investigate the arguments of Book III of the Politics, which is probably the single most important book of the Politics, and certainly its most difficult. It has three clear parts: first, an inquiry into the citizen and citizenship; second, an analysis of the regime in its relation to justice and the common good; and third, an account of kingship in general and a certain kind of absolute kingship in particular. We will consider each of these in turn, but endeavor to show also how each fits together so as to form a sustained argument about the limits to the justice that can be found in any community.