1. Introduction: Nuclear Posture, Nonproliferation Policy, and the Spread of Nuclear Weapons, Erik Gartzke, Matthew Kroenig and Neil Narang PART I: NONPROLIFERATION POLICIES AND THE SPREAD OF NUCLEAR WEAPONS 2. Force or Friendship? Explaining Great Power Nonproliferation Policy, Matthew Kroenig 3. Nuclear Strategy, Nonproliferation, and the Causes of Foreign Nuclear Deployments, Matthew FuhrmannandTodd Sechser 4. Security Guarantees and Allied Nuclear Proliferation, Philipp C. Bleek and Eric B. Lorber 5. Security Commitments and Nuclear Proliferation, Dan Reiter 6. Talking Peace, Making Weapons: IAEA Technical Cooperation and Nuclear Proliferation, Robert Brown and Jeffrey M. Kaplow 7. Making It Personal: Regime Type and Nuclear Proliferation, Christopher Way and Jessica Weeks PART II: NUCLEAR POSTURES AND THE SPREAD OF NUCLEAR WEAPONS 8. The Determinants of Nuclear Force Structure, Erik Gartzke, Jeffrey M. Kaplow and Rupal Mehta 9. Poor Man's Atomic Bomb? Exploring the Relationship between ''Weapons of Mass Destruction', Michael Horowitz and Neil Narang PART III: NUCLEAR POSTURES AND THE CONSEQUNCES OF NUCLEAR WEAPONS 10. What Does It Take to Deter? Regional Power Nuclear Postures and International Conflict, Vipin Narang 11. Conventional Wisdom? The Effect of Nuclear Proliferation on Armed Conflict, David Sobek, Dennis M. Foster and Samuel B. Robison 12. Questioning the Effect of Nuclear Weapons on Conflict, Nicholas L. Miller and Mark Bell PART IV: CONCLUSION 13. Conclusion, Jacob Aronson and Paul Huth