David Scheffer is the Mayer Brown/Robert A. Helman Professor of Law and director of the Center for International Human Rights at Northwestern University Pritzker School of Law. He was the US ambassador at large for war crimes issues (1997-2001) and the UN secretary-general’s special expert for United Nations assistance to the Khmer Rouge Trials (2012-2017). He led the US delegation to the UN talks establishing the International Criminal Court during the 1990s. Scheffer authored the award-winning book All the Missing Souls: A Personal History of the War Crimes Tribunals (2012). He received the Berlin Prize in 2013 and was named one of Foreign Policy magazine’s “Top Global Thinkers” in 2011.