who happen to have these things similar in all, they make up a species of animals of which there are as many as there are of these general combinations of necessary parts.
The same thing is true of what are called states; for a city is not made of one but many parts, as has already been often said; one of which is those who supply it with provisions, called husbandmen, another called mechanics, [1291a] whose employment is in the manual arts, without which the city could not be inhabited; of these some are busied about what is absolutely necessary, others in what contribute to the elegancies and pleasures of life; the third sort are your exchange-men, I mean by these your buyers, sellers, merchants, and victuallers; the fourth are your hired labourers or workmen; the fifth are the men-at-arms, a rank not less useful than the other, without you would have the community slaves to every invader; but what cannot defend itself is unworthy of the name of a city; for a city is self-sufficient, a slave not. So that when Socrates, in Plato's Republic, says that a city is necessarily composed of four sorts of people, he speaks elegantly but not correctly, and these are, according to him, weavers, husbandmen, shoe-makers, and builders; he then adds, as if these were not sufficient, smiths, herdsmen for what cattle are necessary, and also merchants and victuallers, and these are by way of appendix to his first list; as if a city was established for necessity, and not happiness, or as if a shoe-maker and a husbandman were equally useful. He reckons not the military a part before the increase of territory and joining to the borders of the neighbouring powers will make war necessary: and even amongst them who compose his four divisions, or whoever have any connection with each other, it will be necessary to have some one to distribute justice, and determine between man and man. If, then, the mind is a more valuable part of man than the body, every one would wish to have those things more regarded in his city which