William A. Schabas OC MRIA is Professor of International Law at Middlesex University, London, and Professor of International Criminal Law and Human Rights at Leiden University. His numerous publications include Genocide in International Law: The Crime of Crimes, 2nd edition (Cambridge, 2009), The Abolition of the Death Penalty in International Law, 3rd edition (Cambridge, 2002), The UN International Criminal Tribunals: The Former Yugoslavia, Rwanda and Sierra Leone (Cambridge, 2006), The International Criminal Court: A Commentary on the Rome Statute (2010), Unimaginable Atrocities: Justice, Politics, and Rights at the War Crimes Tribunals (2012), The Universal Declaration of Human Rights: The Travaux Préparatoires (Cambridge, 2013), The European Convention on Human Rights: A Commentary (2015) and The Cambridge Companion to International Criminal Law (Cambridge, 2016).