Written by leading experts in the field, this collection offers a critical and comparative analysis of the existing case law on international investment law. The book makes a topical contribution to the existing literature, showing most notably that: (1) international investment law has a longer history than that generally considered and that this history is fundamental to understanding its development; (2) international investment law is crafted today by a large number of actors. These include not only investment arbitrators, but also a variety of international and national courts and tribunals; and (3) the literature and case law in languages other than English and from different legal cultures is essential to grasp the essence of the development of the topic. This book brings together more than 40 experts from different countries and legal traditions and combines conceptual analysis and archival investigation of landmark case law to provide the reader with a fresh and innovative understanding of the breadth of international investment law.