Political scientists describe and explain the policy; philosophers examine it critically and suggest improvements and sometimes radically different social traits. In other words, political philosophers proposed scenarios and dreams where social scientists offer snapshots of existing political organizations. Political philosophy is not a luxury but a necessity, crucial for understanding current affairs and, above all, to think about a better future. But for providing such a service, this discipline should form part of a coherent system that also owned a realistic theory of knowledge, a humanist ethics and worldview consistent with contemporary science and art. In this sense, a responsible policy should not be based on ideology but in philosophy, especially in ethics as well as social technology, which is effective only when it is supported by a serious and rigorous social science. The other axis of Political Philosophy is an analysis of the possibility of extending democracy the political arena to the other relevant areas: wealth management, the natural environment and culture. And here again Mario Bunge suggest an alternative to both capitalism and socialism crisis and defunct and was never genuine. That alternative is the integral democracy: ie equal access to natural resources, equality of sexes and races, equal economic and cultural opportunities, and popular participation in the management of common property. Attentive to the course of our world, in political philosophy Mario Bunge shows us his role as citizen concerned about the historical development