Enzo Cannizzaro is full professor of international law and European Union law at the Sapienza University of Rome. He has been visiting professor at Universities and scientific institutions in Europe and the United States. He is a member of the editorial board of the “Il diritto dell’Unione europea” and member of the scientific board of the “European Journal of International Law” and “Diritti umani e diritto internazionale”. Among his most recent books: “The Law of Treaties Beyond the Vienna Convention”, Oxford University Press, Oxford, 2012 and the textbook “Diritto internazionale”, Giappichelli, Torino, 2014.