Expanded discussions of contemporary theories of world politics, including constructivism and reflectivist approaches. * A new box feature called "Ethics and World Politics" briefly examines moral dilemmas relating to armament and disarmament, warfare, humanitarian relief, economic development, natural resources and distributive justice, and other subjects. * An expanded chapter on international law, including the law of war, human rights law, and the responsibility to protect. Detailed discussion of the International Court of Justice, the International Criminal Court, and other international tribunals. * A streamlined presentation of the different levels of analysis from which to approach the study of world politics, as well as the main schools of thought that present coherent, but often competing, perspectives on the way international society functions. * Updated tables, figures, and references to the scholarly and policy-oriented literature on world politics.