Klaus Bachmann is professor of social sciences at the SWPS University of Social Sciences and Humanities in Warsaw, Poland, specialising in Transitional Justice. He is the author of "Genocidal Empires. German Colonialism in Africa and the Third Reich", Frankfurt/M.: Peter Lang 2018.? Gerhard Kemp is professor of law at Stellenbosch University, and advocate of the High Court of South Africa. He specialises in international criminal law and is the author of "Individual Criminal Liability for the International Crime of Aggression", Cambridge: Intersentia 2ed 2016. Irena Risti? is a researcher at the Institute of Social Sciences in Belgrade, focusing on the history of Serbia in the 19th and 20th century. Her book on the position of Serbian political elites towards the West and Russia prior to World War I is forthcoming.