When mores are sufficient, laws are unnecessary. When mores are insufficient, laws are unenforceable. - Émile Durkheim

At this point, an urgent question arises:... Is it our duty to seek to become a thorough and complete human being, one quite sufficient unto himself; or, on the contrary, to be only a part of a whole, the organ of an organism? Briefly, is the division of labor, at the same time that it is a law of nature, also a moral rule of human conduct; and, if it has this latter character, why and in what degree?

The division of labour is not of recent origin, but it was only at the end of the eighteenth century that social cognizance was taken of the principle. though, until then, unwitting submission had been rendered to it. To be sure, several thinkers from earliest times saw its importance; but Adam Smith was the first to attempt a theory of it. Moreover, he adopted this phrase that social science later lent to biology.

At the moment when this solidarity exercises its force, our personality vanishes, as our definition permits us to say, for we are no longer ourselves, but the collective life.