The structural unity of the parts is such that, if any one of them is displaced or removed, the whole will be disjointed and disยญturbed. For a thing whose presence or absence makes no visible difference is not an organic part of the whole.
AristotleAll men agree that a just distribution must be according to merit in some sense; they do not all specify the same sort of merit, but democrats identify it with freemen, supporters of oligarchy with wealth (or noble birth), and supporters of aristocracy with excellence.
Aristotle