Moreover, friendship would seem to hold cities together, and legislator would seem to be more concerned about it than about justice. For concord would seem to be similar to friendship, and they aim at concord among all, while they try above all to expel civil conflict, which is enmity. Further, if people are friends, they have no need of justice, but if they are just they need friendship in addition; and the justice that is most just seems to belong to friendship.
[Aristotele, Etica Nicomachea II.4, 1105b10-15
trad. Terence Irwin]