This book explores law-making in international affairs and is compiled to celebrate the 50th birthday of Professor Jan Klabbers, a leading international law and international relations scholar who has made significant contributions to the understanding of the sources of international legal obligations and the idea of constitutionalism in international law. Inspired by Professor Klabbers’ wide-ranging interests in international law and his interdisciplinary approach, the book examines law-making through a variety of perspectives and seeks to breaks new ground in exploring what it means to think and write about law and its creation.

While examining the substance of international law, these contributors raise more general concerns, such as the relationship between law-making and the application of law, the role and conflict between various institutions, and the characteristics of the formal sources of international law. The book will be of great interest to students and academics of legal theory, international relations, and international law.

Rain Liivoja is a Senior Research Fellow at the Asia Pacific Centre for Military Law, Melbourne Law School, and an Affiliated Research Fellow of the Erik Castrén Institute of International Law and Human Rights, University of Helsinki. Jarna Petman is Deputy Director of the Erik Castrén Institute of International Law and Human Rights, University of Helsinki, and a Research Fellow at the Academy of Finland Centre of Excellence in the Foundations of European Law and Polity Research.