’Serious theoretical analyzes of international law have been all too few and far between. This very valuable collection brings together the best of them and provides a highly informative road map for readers.’ Philip Alston, New York University Law School, USA ’Anyone interested in the key twentieth century debates about the nature(s) of international law will find this book compelling reading. A fascinating array of theorists are brought into provocative conversation with each other, revealing sometimes surprising commonalities and providing new insights into old controversies. The book is a must for international lawyers and international relations scholars.’ Dianne Otto, Senior Lecturer, The University of Melbourne, Australia ’...a valuable collection which helps those catching up on this important area of law.’ Law Society Journal