Introduction Robert O. Keohane -- Part I. The Context for Humanitarian Intervention: 1. The humanitarian intervention debate J. L. Holzgrefe -- 2. Humanitarian intervention before and after 9/11: legality and legitimacy Tom J. Farer -- Part II. The Ethics of Humanitarian Intervention: 3. The liberal case for humanitarian intervention Fernando R. Teson -- 4. Reforming the international law of humanitarian intervention Allen Buchanan Part III. Law and Humanitarian Intervention -- 5. Changing the rules about rules?: unilateral humanitarian intervention and the future of international law Michael Byers and Simon Chesterman -- 6. Interpretation and change in the law of humanitarian intervention Thomas M. Franck -- 7. Humanitarian intervention: incremental change versus codification Jane Stromseth Part IV. The Politics of Humanitarian Intervention -- 8. Political authority after intervention: gradations in sovereignty Robert O. Keohane -- 9. State failure and nation-building Michael Ignatieff.