Graduated in Law (1977) in the Law Faculty of Recife, Federal University of Pernambuco. Master (1980), Doctor (1986) and Livre Docente (2011) in Philosophy and Theory of Law in the Law Faculty of São Paulo University. Assistant Professor (1983) and Full Professor (1990) for Philosophy and Theory of Law in the Law Faculty of Recife, Federal University of Pernambuco. Visiting Scholar for two years in the University of Mainz, Germany, with the support of the Alexander von Humboldt Foundation (1988-1989). Visiting Scholar for two to four months in the Universities of Mainz (1991), Freiburg-im-Breisgau (1995), Heidelberg (2000, 2003, 2009 and 2011) and Hagen (2014-2015), with the support of the Alexander von Humboldt Foundation. Doctor Honoris Causa in the Metropolitanas Unidas Faculty, São Paulo (2009). Honorary citizen of the states of Pernambuco (2012) and Piauí (2013). Researcher in the National Council for Scientific and Technological Development CNPq (since 1984). Leader of the Juridical Rhetoric Research Group. Senior Researcher (1-A) in the same CNPq (since 1990). Scientific Advisor and Referee of the Coordination to the Development of Superior Level Personal CAPES (since 1990). Ad hoc Scientific Advisor and Referee for the regional Public Foundations to support scientific research in the following states of Brazil: Pernambuco, Rio de Janeiro, Pará, Rio Grande do Sul, Rio Grande do Norte, Paraná, Santa Catarina, Alagoas and Ceará (since 1990). Member of the Committee to evaluate candidates to the Deutscher Akademischer Austauschdienst DAAD in Brazil (2003-2005). Member of the Collegio Docente del Dottorato di Recerca in "Sistemi giuridici e politico-sociali comparati" della Università del Salento, Lecce, Italy (since 2011). Member of the Committee for Juridical Teaching of the Brazilian Lawyers Association OAB (1995-2000, 2006-2007 and 2009-2014). President of the Committee for Implementation of the Disciplines of the Fundamental Axis in the Brazilian Lawyers Associations National Exam (2011-2012). Honorary Member of the National Council for Research and Post-Graduation in Law CONPEDI (since 2009). Member of the Executive Committee of the International Association of Philosophy of Law and Social Philosophy IVR (2011-2019). Held courses, speeches and conferences in more than a hundred Brazilian Universities and in the Foreign Universities of Mainz (1989 e 1991), Göttingen (1991, 2000), Heidelberg (2000, 2003, 2006, 2009, 2011), Freiburg im Breisgau and Frankfurt am Main (1995), Augsburg (1995), New York Pace and Pennsylvania Duquesne (1999), Coimbra (2000), Pablo de Olavide de Sevilla (2000), Lecce (2004), Nacional del Comahue de San Carlos de Bariloche (2005, 2008), Patras (Greece) (2006), de los Andes and Católica de Chile (2008), Bielefeld (2009), Frankfurt a. M. (2011), Lisboa (2012, 2014). Publishing Director of the Anuário dos Cursos de Pós-Graduação em Direito of the Federal University of Pernambuco (1995-2005). Author of 6 books, more than 50 book chapters and more than 100 articles published in Brazil, Germany, Italy, India, Holland, Portugal, Spain, France, United States and Argentina in the areas of Philosophy of Law, Theory of Law, History of Law, Sociology of Law, Educational Law and Constitutional Law. Editor and organizer of more than 15 collective books.