Among the prominent legal roles Claus-Dieter Ehlermann has played in his career, his leadership of the Legal Service of the European Commission is perhaps the best known. This liber amicorum appears as his term at the Appellate Body of the World Trade Organization draws to a close. In this book 30 of his colleagues offer fresh and provocative insights into many of the areas of international law on which Professor Dr Ehlermann has left his stamp. Topics include: the WTO dispute settlement system; regulation of trade barriers; the first signs of a global jurisprudence; the principle of proportionality; enforcement of competition law; and the place of human rights in European and global integration. This book's evaluations and proposals should find thought-provoking echoes in the minds of all those concerned with any of the integration processes under way in today's interdependent world.