Full Idea
There are two sorts of political justice, one natural and the other legal; the natural is that which has the same validity everywhere and does not depend upon acceptance.
Gist of Idea
Natural justice is the same everywhere, and does not (unlike legal justice) depend on acceptance
Source
Aristotle (Nicomachean Ethics [c.334 BCE], 1134b18)
Book Reference
Aristotle: 'Ethics (Nicomachean)', ed/tr. ThomsonJ A K/TredennickH [Penguin 1976], p.189
A Reaction
This I take to be the germ out of which Aquinas developed more fully the idea of 'natural law'. This remark is strong counterevidence that Aristotle was not merely describing convention in his theory of the virtues.
Related Idea
Idea 2818 The virtues of a good citizen are relative to a particular constitution [Aristotle]