I. 8livelihood, seems to be given by nature herself to all, both when they are first born,10 and when they are grown up. For some animals bring forth, together with their offspring, so much food as will last until they are able to supply themselves; of this the vermiparous or oviparous animals are an instance; and the viviparous animals have up to a certain time a supply of food for their young in themselves, which is called milk. 11In like manner we may infer that, after the birth of animals, plants exist for their sake, and that the other animals exist for the sake of man, the tame for use and food, the wild, if not all, at least the greater part of them, for food, and for the 12provision of clothing and various instruments. Now if nature makes nothing incomplete, and nothing in vain, the inference must be that she has made all animals and plants for the sake of man. And so, in one point of view, the art of war is a natural art of acquisition, for it includes hunting, an art which we ought to practise against wild beasts, and against men who, though intended by nature to be governed, will not submit; for war of such a kind is naturally just[1].
13Of the art of acquisition then there is one kind which is natural and is a part of the management of a household[2]. Either we must suppose the necessaries of life to exist previously, or the art of household management must provide a store of them for the common use of the family or state. 14They are the elements of true wealth; for the amount of property which is needed for a good life is not unlimited, although Solon in one of his poems says that,
'No bound to riches has been fixed for man[3].'
