The theory of the contigncia appeared as one of the solutions for the problem of if defining the nature human being. In this theory everything depends everything is relative, for each company has a way of if to manage, everything depends on the situation, the administrative attributions will have in accordance with to be taken the moment, different types of organization depend on different types of authority and being able and that this becomes the type of development that its members start to have. To understand as the organizations they function, is necessary to understand as the people in these organizations function, with this intention had appeared three main and different sets of hypotheses, through experiences in the companies where the scholars in the subject had inside observed the behavior of the people of the organization: 1 – Rational-economic hypotheses: These hypotheses are based on the philosophy of the hedonism where they tell that the people act to take care of to the maximum to its personal interests. Douglas McGregor created, in 1960, two theories that had been known with Theory X and Theory Y. Theory X makes generalizations and simplificaes exaggerated on the nature human being and Theory Y has a more idealistic vision. rational-economic hypotheses had classified the human beings in two groups: the mass infuriates reliable motivated for the money and the reliable, moral worthy elite, more motivated, who must organize and direct the mass. That is, the first group is the employees and second group the standards. 2 – Social hypotheses: In these hypotheses two classic studies show, for the first time, the importance of the social reasons in the organizacional life..