Aristotle, Politics, 1280b-1281a:
It is clear then that a state (Ï€ÏŒÎ»Î¹Ï‚) is not a mere society, having a common place (ÎºÎ¿Î¹Î½Ï‰Î½Î¯Î± Ï„ÏŒÏ€Î¿Ï…), established for the prevention of mutual crime and for the sake of exchange. These are conditions without which a state cannot exist; but all of them together do not constitute a state, which is a community of families and aggregations of families in well-being, for the sake of a perfect and self-sufficing life. Such a community can only be established among those who live in the same place and intermarry. Hence arise in cities family connections, brotherhoods, common sacrifices, amusements which draw men together. But these are created by friendship (Ï†Î¹Î»Î¯Î±Ï‚), for the will to live together is friendship. The end of the state is the good life, and these are the means towards it. And the state is the union of families and villages in a perfect and self-sufficing life, by which we mean a happy and honorable life.
Our conclusion, then, is that political society exists for the sake of noble actions, and not of mere companionship. Hence they who contribute most to such a society have a greater share in it than those who have the same or a greater freedom or nobility of birth but are inferior to them in political virtue; or than those who exceed them in wealth but are surpassed by them in virtue.”