This article analyses the participative, deliberative and pluralist conceptions ofn democracy than focus the current debates on this topic. They are models than have different premises and arrive to diverse conclusions. It's analyzed the notion of rationality and reasonability of the individuals. And also, the concept of egoism and the possibility of altruism and the transition from individual autonomy to collective self-government. Finally it's proposed the will's theory and the interest's theory for arriving to some conclusions.