Principles of International Economic Law provides a comprehensive overview of the central topics in international economic law, with an emphasis on the interplay between the different economic and political interests on both the international and domestic levels. Following recent tendencies, the book examines classical topics of international economic law - such as WTO law, investment protection, commercial law, and monetary law - in context with emerging aspects of human rights, environmental protection, and the legitimate claims of developing countries. A perfect introductory text to the field of international economic law, the book thoroughly analyses legal developments within their wider political, economic, or social context. Topics covered range from codes of conduct for multinational enterprises, to human rights implications of the exploiting natural resources and the legal impact of climate protection. The book demonstrates the economic foundations and economic implications of legal frameworks. It puts into profile the often-complex relationship between, on the one hand, international standards on liberalization and economic rationality and, on the other, state sovereignty and national preferences. It describes the newly developed forms of economic cooperation between states, such as the G7, the G20, or the BRICS. Herdegen's Principles of International Economic Law has established itself as a leading textbook in the field. This fully updated third edition covers new aspects and developments, with a particular focus on corporate social responsibility, challenges for WTO law, mega-regional agreements such as CPTPP, the impact of human rights law and environmental standards, and cryptocurrencies.