The purpose of this course is to examine the economic interaction between States as well as the economic relationships between states and non-government entities. It aims to critically examine not only the law governing these relationships but also the different law-making processes. The main goal is to provide an overview of the legal and institutional foundations of international trade law. It covers issues such as multilateral and regional trade law principles/doctrines, international monetary relations, investment, sustainable development (energy and IP), and regional economic integration principles. The module also covers GATT/WTO, thus analysing the basic law of the world trading system. The module offers an analysis of international trade law governing foreign investments and its relationship to public policy. Firstly, it identifies and examines the sources, scope and content of the substantive international law rules that determine investor-State relationships and discusses their application in practice. Secondly, it explores from a theoretical and a practical perspective the role and policy goals of international trade law, focusing on the relationship between investment promotion and protection. This module is suitable for students interested in acquiring a thorough and deep understanding of international trade law, as well as critically assessing the role and objectives of international investment law and their balancing against other regulatory interests. It also provides the theoretical and practical knowledge necessary for legal practitioners in the field and for those seeking to advice governmental bodies, private companies or civil society organisations on matters related to international investment law and policy.