The psychology of human behavior obeys the same laws as the animal world, dictated by the superimposition and perpetuation of the species. In contrast, the motivation of our behavior derives not only from inheritance and genetic predisposition (everything related to I want), but is also influenced by social aspects (I must). The struggle between these 2 levels is at the basis of all our choices and deeds, be they licit, antisocial or antisocial. Effective social control is impossible without taking into account the particularities of man's interaction with society, as a biological organism and a social being.