He is professor of philosophy of law at the University of Roma Tre. He is the author of numerous major works which have been published in this same Spanish version Publisher: The Wild Powers. The crisis of constitutional democracy (22011); Principia iuris. Theory of Law and Democracy (3 vols, 2011.) Law and reason. Theory of penal guarantees (102011); Democracy and garantismo (22010); Rights and guarantees. The law of the weakest (72010); The basics of fundamental rights (42009); Guarantees. A discussion of law and democracy (22009), and legal reasons of pacifism (2004).