This fully-updated second edition provides a comprehensive survey of public international law, with useful references throughout to current events, classic and contemporary cases and scholarship. It is designed as a stand-alone text or as a complement to all the major casebooks on the topic. The first section of the book addresses the fundamental structure, actors, and history of international law; the second section focuses on the interface of international law and national law; and the final section covers key subject matter areas: human rights, the law of the sea, international environmental law, international criminal law, and the use of force.