This edition of Public International Law in a Nutshell remains a concise yet accurate summary of the field of public international law, covering its basic structure, sources, actors, and procedures, and key subject matter areas, such as human rights, the law of the sea, international environmental law, use of military force, and U.S. foreign relations law. This edition, which is intended to be helpful for students, scholars, and practitioners alike, is fully updated to include recent treaties, practice, institutions, and International Court of Justice decisions.