This open access book brings together some of the most eminent scholars of international trade to celebrate the scholarly, diplomatic, and institution-building achievements of Thomas Cottier, Professor Emeritus of International Economic Law at the University of Bern and founder of the World Trade Institute. Over his half-century career, Thomas Cottier has promoted the development of international trade law by shaping our understanding of how multiple layers of law interact to form a global legal system. While multilateral trade law is the "melody" of the system, it is made fuller by a host of regional and national layers of harmonising - and sometimes discordant - legal rules. Covering both general trade policy and the economic relations between Switzerland and the EU, the chapters examine Thomas Cottier's fundamental belief in the necessity of studying the interaction of every level of governance - local, national, and international - when considering the policies of economic exchange between countries, as well as his cosmopolitan belief in the need to foster a global community dedicated to bettering the lives of individuals around the world. The special relationship between the EU and Switzerland is addressed, honouring Professor Cottier's dedication to the political debates within Switzerland on the extent to which the country should participate in the European project, exemplifying the themes of multilayered governance and the common concerns of all people. The book's contributors comprise leading scholars and practitioners who have worked closely with, or whose work and professional journeys have been largely influenced by, Thomas Cottier. The ebook editions of this book are available open access under a CC BY-NC-ND 4.0 licence on bloomsburycollections.com. Open access was funded by the Swiss National Science Foundation.