[Joost Pauwelyn is Professor of International Law and Co-Director of the Centre for Trade and Economic Integration, Graduate Institute of International and Development Studies in Geneva.] Thank you to Professors David Zaring, Tai-Heng Cheng and Chris Brummer for their truly insightful and extremely helpful comments. Our
book, and this discussion, is clearly only the beginning of a much longer debate on what, I predict, will turn out to be a radical transformation of the international legal system. On David’s question: Why now? Haven’t we always seen informality? Yes, but today...