Now I affirm, that all these states have, without exception, fallen into excess; and also that he should not have said that one oligarchy was better than another, but that it was not quite so bad. But this question we shall not enter into at present. We shall first inquire how many different sorts of free states there are; since there are many species of democracies and oligarchies; and which of them is the most comprehensive, and most desirable after the best form of government; or if there is any other like an aristocracy, well established; and also which of these is best adapted to most cities, and which of them is preferable for particular persons: for, probably, some may suit better with an oligarchy than a democracy, and others better with a democracy than an oligarchy; and afterwards in what manner any one ought to proceed who desires to establish either of these states, I mean every species of democracy, and also of oligarchy. And to conclude, when we shall have briefly gone through everything that is necessary, we will endeavour to point out the sources of corruption, and stability, in government, as well those which are common to all as those which are peculiar to each state, and from what causes they chiefly arise. CHAPTER III The reason for there being many different sorts of governments is this, that each state consists of a great number of parts; for, in the first place, we see that all cities are made up of families: and again, of the multitude of these some must be rich, some poor, and others in the middle station; and that, both of the rich and poor, some will be used to arms, others not. We see also, that some of the common people are husbandmen, others attend the market, and others are artificers. There is also a difference between the nobles in their wealth, and the dignity in which they live: for instance, in the number of horses they breed; for this cannot be supported without a large fortune: for which reason, in former times, those cities whose strength consisted in horse became by that means oligarchies; and they used horse in their expeditions against the neighbouring cities; as the Eretrians the Chalcidians, the Magnetians, who lived near the river Meander, and many others in Asia. Moreover, besides the difference of fortune, there is that which arises from family and merit; or, if there are any other distinctions [1290a] which make part of the city, they have been already mentioned in treating of an aristocracy, for there we considered how many parts each city must necessarily be composed of; and sometimes each of these have a share in the government, sometimes a few, sometimes more.