Randall Lesaffer is Professor of Legal History at KU Leuven in Belgium and Tilburg University in the Netherlands. He is the author of European Legal History: A Cultural and Political Perspective (2009) and co-editor of The Cambridge Companion to Hugo Grotius (2021). He is the editor-in-chief of the book series Studies in the History of International Law, an editor of the Global Law series and an editor of the Journal of the History of International Law. Robert Kolb is Professor of Public International Law at the University of Geneva. He is a former legal staff member of the ICRC, and a member of the International Humanitarian Law section at the High Command of the Swiss Army. He has written extensively on international law. Momchil Milanov is an Associate Legal Officer at the International Court of Justice and studies public international law at the University of Geneva. His research interests include the history and theory of international law, international procedural law, dispute settlement, nationality, and citizenship.