In this classic text about Machiavelli, Althusser discusses the possibility of a revolutionary policy when all the conditions for inventing new forms of social organization exist, but the protagonists of such transformation fail to shape themselves: the problem lies then in the need to think and to organize the new political machines that will unleash the revolutionary process in the void of the non-existence of the policy that will shape the future, and at the present juncture of real domination. Machiavelli answers this question by asking about the characteristics of the New Prince that will impose democratic political forms and open the pathways of absolute democracy in the new constituent process, thus inaugurating the tradition of modern materialism that, with Spinoza and Marx, flows into the theoretical framework. -practice of contemporary communist experience. The book is preceded by an introduction by Antonio Negri.