Few issues have been so intensively discussed in legal theory and constitutional aw as the crisis of legal positivism. The publication of The Concept of Law by Hart in 1961 represented a milestone in the theory of law of the twentieth century, both for the theoretical innovations that it contributed, representing a refinementf the theory juspositivista, as for the fruitful discussions that resulted. This debate, which begins with the first criticism of Dworkin to Hart s positivism in the Model of Rules I and II, and is developed till today with very strong internal debates in legal positivism. Among them, the analysis focus on inclusive positivism, a term created by Wilfrid Waluchow but whose origins date back to the early 70ths The main proposal of this version is to reconcile some of the criticisms of Dworkin with the tenants of positivist tradition. The proposal was, on one hand, to reject part of, Dworkin critics to legal positivism, and on the other, exclusive theories such as Raz s conception of law, seeking thereby to maintain the foundations of legal positivism and give an account of the main features of contemporary constitutional states - the extensive incorporation of moral values, especially in constitutional charters. Initially, this dissertation seeks for the grounds of positivist tradition. Then the debate will be located in Hart/Dworkin scenario to analyze its developments, focusing on the emergence and consolidation of Inclusive Positivism. Finally, it deals with the recent contributions to the debate, balancing the arguments involved and discussing its relevance today.