The idea of natural law is based on a belief that there exists a moral order which every normal person can discover by using his reason. Its role is to provide a concept of human nature and justice to serve as the rationale for the legal and social system of society,. and its primary concern . . . is with justice and the moralization of power..

There is in men, even when they are powerful, some natural inclination to act accordingly to reason in what conditions their power. That is, they naturally seek to establish the legitimacy of their power and also to have their uses of it publicly recognized as legitimate. They are naturally disinclined to appear to themselves or to others as unreasonable, as men who do not act according to virtue, as unnatural men.