Starting with a selection of classical articles on international institutions, this book traces the evolution of regime analysis over the last two decades as a new perspective on international governance. In the process it provides a full account of the major schools of thought that have arisen to account for the demand for international governance, the formation of international regimes, and the effectiveness of international governance systems. By drawing a clear distinction between institutions and organizations and then analysing the relationship between the two, the book clarifies the concept of 鈥榞overnance without government鈥? A number of essays explore the probable impact of the proliferation of international regimes on the character of international society. The book鈥檚 concluding section takes stock of the current status of regime and analyses and assesses emerging challenges in this vibrant field of study. 40 articles, dating from 1947 to 1995 Contents: Volume I: Introduction Part I: International Institutions 鈥?Classic Perspectives Part II: The Demand for International Governance Part III: International Regimes as Governance Systems Part IV: The Supply of International Governance Index 鈥?Volume II: Introduction Part I: Implementation, Compliance and Administration Part II: Regime Effectiveness Part III: Regimes, Governance Systems and International Society Part IV: Institutional Design Principles Part V: Future Directions Index Contributors: L.M. Goodrich H.K. Jacobson, M. Levy, M. McGinnis, H. M眉ller, R. O鈥橩eohane.