Two central questions are at the core of international legal theory: 'What is international law?', and 'Is international law really law?' This volume examines these critical questions and the philosophical foundations of modern international law using the tools of Anglo-American legal theory and western political thought. Engaging with both contemporary and historical legal theory and with an analysis of international law in action, the book builds an understanding and theory of law from the perspective of those who actually use this legal system and understand it, rather than constructing an...