 Positivism asserted very early its wish to construct a moral doctrine that owes nothing to the supernatural. If we need a spiritual power, it is because social questions are quite often moral rather than political. The reforms of society must be made in a determined order: one has to change ideas, then morals (les moeurs; the word is difficult to translate: it is something like ways of acting, habits, les us et coutumes), and only then institutions. But with the System, the moral doctrine (ethics) changes status and becomes a science, whose task is to extend sociology in order to take individual phenomena into account, in particular affective ones.