Using contemporary examples, this Third Edition builds on the previous editions by contextualizing and dramatizing recent events with reference to seven features that characterize the New Haven School approach to international law: participants, perspectives, arenas of decision, bases of power, strategies, outcomes, and effects. This new edition highlights cutting-edge ideas in international law, including the right to self-determination, the evolution of Taiwan statehood, the expanding scope of international concern and the duty of states to protect human rights, the trend towards greater accountability for states and individual decision-makers under international law, and the vital role individual responsibility plays in the emerging field of international criminal law. It offers a new generation the intellectual tools needed to act as responsible citizens in a world community seeking human dignity and human security for all people.