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.

• Introduction; 1. International Law at the time of the League of Nations Carlo Focarelli; 2. The League of Nations and the Global Legal Order Leonard V. Smith; 3. The scholarship of international law at the time of the League of Nations Asier Garrido-Muñoz; 4. The League of Nations as an international organisation Philip Burton and Christian J. Tams; 5. The League of Nations and the relationship between international law and municipal law Philip Burton and Jean d'Aspremont; 6. Sovereignty, territory and jurisdiction Malgosia Fitzmaurice and Paul Gragl; 7. The law of the sea at the time of the League of Nations Yoshifumi Tanaka; 8. Colonies and mandates at the time of the League of Nations Giovanni Distefano and Aymeric Hêche; 9. The use of force in the Interbellum: a look at the debate on the meaning of 'war' in the Covenant of the League of Nations and Briand-Kellogg Pact Agatha Verdebout; 10. Law of armed conflict and neutrality Etienne Henry; 11. Preventive diplomacy, peacekeeping and peace-making at the time of the League of Nations Ivan Ingravallo and Pavle Kilibarda; 12. The law of State responsibility in the interwar years: a period of 'great advances' Paolo Palchetti; 13. 'The beginning of something great'? International criminal law in the interwar period Sévane Garibian; 14. Investment Tarcisio Gazzini; 15. Trade integration and the League of Nations Petros C. Mavroidis; 16. Minorities, refugees and human rights at the time of the League of Nations Momchil Milanov and León Castellanos-Jankiewicz; 17. A period of reckoning: private international law during the time of the League of Nations Roxana Banu; 18. Diplomatic law at the time of the League of Nations Giuseppe Puma; 19. Dispute settlement, particularly adjudication and arbitration Gleider Hernández and Momchil Milanov; 20. The League for nature: environmental law in the League of Nations Omer Aloni and Anna-Katharina Wöbse; 21. Soviet approaches to international law during the interwar period Lauri Mälksoo; 22. The Americas at the Time of the League of Nations Juan Pablo Scarfi.

'… an excellent addition to what promises to be an outstanding collective history.' William E. Butler, Jus Gentium: Journal of International Legal History