This timely book examines international trade and investment law at various levels of governance, including unilateral, bilateral, regional, and multilateral arrangements. Rafael Leal-Arcas demonstrates that the nature of international trade law is fragmented and cyclical. Whilst not always straightforward, the process of making international trade law more multilateral, beginning with the General Agreement on Tariffs and Trade in 1947, has been largely successful. The author shows how this success could be emulated for international investment law, as well as providing a careful analysis of the choice of jurisdiction - regional versus global - for the settlement of disputes. This insightful book will be an invaluable resource for research institutions, legal practitioners, judges, trade and investment policy-makers, officials at international organizations and national civil servants. Advanced students of international economic law, international investment law, external relations law of the EU, international trade law and WTO law will also find this book important.