Werner Jaeger suggested that the Politics actually represents the conflation of two, distinct treatises. The first (Books I-III, VI-VIII) would represent a less mature work from when Aristotle had not yet fully broken from Plato, and consequently show a greater emphasis on the best regime. The second (Books IV-VI) would be more empirically minded, and thus belong to a later stage of development.
Carnes Lord has argued against the sufficiency of this view, however, noting the numerous cross-references between Jaeger's supposedly separate works and questioning the difference in tone that Jaeger saw between them. For example, Book IV explicitly notes the utility of examining actual regimes (Jaeger's "empirical" focus) in determining the best regime (Jaeger's "Platonic" focus). Instead, Lord suggests that the Politics is indeed a finished treatise, and that Books VII and VIII do belong in between Books III and IV; he attributes their current ordering to a merely mechanical transcription error..
A third possibility is that Aristotle intended to reorganize the already-completed Politics, but died before he was able to do so. The initial treatise would have had Books VII-VIII in between Books III and IV, but that later compilers altered the ordering based on an intended revision suggested by the Nicomachean Ethics. This theory would require that our version of the Nicomachean Ethics be later in date than our version of the Politics.
"For man, when perfected, is the best of animals, but, when separated from law and justice, he is the worst of all; since armed injustice is more dangerous."
Part III "Seeing then that the state is made up of households..." Aristotle discusses the relationships within a typical household. First, there is a relationship of masters to slaves. Second, one between husband and wife. Third, there is the relationship of the father to his children. In this way the "man of the house", the master, husband and father, is conceived as the central political unit of the household. The topics of husband and father are discussed from Part XII.
"In the lives of men too there is a great difference. The laziest are shepherds, who lead an idle life, and get their subsistence without trouble from tame animals."
Part IX Aristotle distinguishes the use of a thing for its own value, from deriving value from things merely by exchanging them.
"There is another variety of the art of acquisition... Of everything which we possess there are two uses... a shoe is used to wear and is used for exchange."
Speaking of exchange through money, Aristotle says "it is worthless, and because it is not useful as a means to any of the necessities of life, and, indeed, he who is rich in coin may often be in want of necessary food..." Aristotle says people become avaricious and pursue money for its own end because of a confusion between the instrument of money (in exchange) with things that can actually be used...
"in this art of wealth-getting there is no limit of the end, which is riches of the spurious kind, and the acquisition of wealth. But the art of wealth getting which consists in household management, on the other hand, has a limit..."
"There are two sorts of wealth-getting, as I have said; one is a part of household management, the other is retail trade: the former necessary and honorable, while that which consists in exchange is justly censured; for it is unnatural, and a mode by which men gain from one another. The most hated sort, and with the greatest reason, is usury, which makes a gain out of money itself, and not from the natural object of it. For money was intended to be used in exchange, but not to increase at interest. And this term interest, which means the birth of money from money, is applied to the breeding of money because the offspring resembles the parent. Wherefore of all modes of getting wealth this is the most unnatural."
"There is the anecdote of Thales the Milesian and his financial device, which involves a principle of universal application, but is attributed to him on account of his reputation for wisdom. He was reproached for his poverty, which was supposed to show that philosophy was of no use. According to the story, he knew by his skill in the stars while it was yet winter that there would be a great harvest of olives in the coming year; so, having a little money, he gave deposits for the use of all the olive-presses in Chios and Miletus, which he hired at a low price because no one bid against him. When the harvest-time came, and many were wanted all at once and of a sudden, he let them out at any rate which he pleased, and made a quantity of money. Thus he showed the world that philosophers can easily be rich if they like, but that their ambition is of another sort. He is supposed to have given a striking proof of his wisdom, but, as I was saying, his device for getting wealth is of universal application, and is nothing but the creation of a monopoly. It is an art often practiced by cities when they are want of money; they make a monopoly of provisions."
"Property should be in a certain sense common, but, as a general rule, private; for, when everyone has a distinct interest, men will not complain of one another, and they will make more progress, because every one will be attending to his own business. And yet by reason of goodness, and in respect of use, 'Friends,' as the proverb says, 'will have all things common.' Even now there are traces of such a principle, showing that it is not impracticable, but, in well-ordered states, exists already to a certain extent and may be carried further. For, although every man has his own property, some things he will place at the disposal of his friends, while of others he shares the use with them."
Aristotle extends the debate into a theory of individual self interest and action.
"Again, how immeasurably greater is the pleasure, when a man feels a thing to be his own; for surely the love of self is a feeling implanted by nature and not given in vain, although selfishness is rightly censured; this, however, is not the mere love of self, but the love of self in excess, like the miser's love of money; for all, or almost all, men love money and other such objects in a measure. And further, there is the greatest pleasure in doing a kindness or service to friends or guests or companions, which can only be rendered when a man has private property. These advantages are lost by excessive unification of the state."