This is an innovative contribution to the philosophy of human rights. Considering both legal and philosophical scholarship, the views here bear an importance on the legitimacy of international politics and international law. As a result of more than 10 years of research, this revised edition engages with current debates through the help of new sections. Pluralistic universalism considers that, while formal filtering criteria constitute unavoidable requirements for the production of potentially valid arguments, the exemplarity of judgmental activity, in its turn, provides a pluralistic and retrospective reinterpretation for the fixity of such criteria. While speech formal standards grounds the thinnest possible presuppositions we can make as humans, the discursive exemplarity of judgments defends a notion of validity which is both contextually dependent and "subjectively universal". According to this approach, human rights principles are embedded within our linguistic argumentative practice. It is precisely from the intersubjective and dialogical relation among speakers that we come to reflect upon those same conditions of validity of our arguments. Once translated into national and regional constitutional norms, the discursive validity of exemplar judgments postulates the philosophical necessity for an ideal of legal-constitutional pluralism, challenging all those attempts trying to frustrate both horizontal (state to state) and vertical (supra-national-state-social) on-going debates on human rights. On the first edition of this book: "Claudio Corradetti's book is a thoughtful attempt to find an adequate theoretical foundation for human rights. Its approach is interdisciplinary in nature, drawing on issues in analytical philosophy as well as contemporary political theorists, and the result is a densely argued text aimed at scholars ... ." (Andrew Lambert, Metapsychology Online Reviews, Vol. 14 (3), January, 2010)