Introduction I. Sovereign Authority and the Right to Use Armed Force in Classic Just War Tradition1.Sovereignty as Responsibility: The Coming Together and Development of a Tradition2.Sovereign Authority and the Justified Use of Force in Thomas Aquinas and His Early Modern Successors3.Sovereign Authority and the Justified Use of Force in Luther and the Reformation4.Grotius and His Impact: The Westphalian Settlement, the Idea of the "Law of Nations," and the Move to the Territorial Idea of Sovereignty5. Transitions in the Concept of Sovereignty II. Engaging the Westphalian Idea of Sovereignty6. Finding Common Ground in the Diversity of Civilizations7. The Two Conceptions of Sovereignty and the "Responsibility to Protect" Doctrine Conclusion Bibliography Index