Book 4
1290b
It has then been stated that there are several forms of constitution, and what is the cause of this; but let us take the starting-point that was laid down beforeSee 3.1. and say that there are more forms than those mentioned, and what these forms are, and why they vary. For we agree that every state possesses not one part but several. Therefore just as, in case we intended to obtain a classification of animals, we should first define the properties necessarily belonging to every animal (for instance some of the sense organs, and the machinery for masticating and for receiving food, such as a mouth and a stomach, and in addition to these the locomotive organs of the various species), and if there were only so many necessary parts, but there were different varieties of these (I mean for instance certain various kinds of mouth and stomach and sensory organs, and also of the locomotive parts as well), the number of possible combinations of these variations will necessarily produce a variety of kinds of animals (for it is not possible for the same animal to have several different sorts of mouth, nor similarly of ears either), so that when all the possible combinations of these are taken they will all produce animal species, and there will be as many species of the animal as there are combinations of the necessary parts:—so in the same way also we shall classify the varieties of the constitutions that have been mentioned. For states also are composed not of one but of several parts, as has been said often. One of these parts therefore is the mass of persons concerned with food who are called farmers,
