Sumit Ganguly and S. Paul Kapur give us an unusually productive dialogue between deeply informed scholars who disagree about an issue of great theoretical interest and policy relevance. The stability of the South Asian nuclear balance is debated with such a fruitful combination of analytical rigor and empirical evidence that students of both the region and the general topic of proliferation will learn a great deal. -- Robert Jervis, Columbia University This is a great book for learning about the India-Pakistan conflict as well as nuclear deterrence theory. Sumit Ganguly and S. Paul Kapur, both first-class strategists, examine the effects of nuclear weapons on the rivalry between Islamabad and New Delhi and reach carefully reasoned yet opposing conclusions. -- John J. Mearsheimer, University of Chicago These eminent scholars of nuclear proliferation achieve a masterful blend of policy-relevant theory, empirical research, and rigorous analysis. In doing so, they drive the optimism/pessimism debate to a refreshing new level of subtlety and sophistication. Policymakers and professors alike will be delighted to have this compelling book at hand. -- Devin T. Hagerty, University of Maryland Did the spread of nuclear weapons to India and Pakistan deter war or provoke aggression? Two prominent scholars of South Asian politics address this important question in a debate filled with insight and wit. Some readers will agree with Sumit Ganguly's optimistic assessment, and some will agree with S. Paul Kapur's more pessimistic appraisal. All will come away with a more nuanced understanding of the complex political effects of nuclear weapons. -- Scott D. Sagan, The Caroline S.G. Munro Professor of Political Science, Stanford University A lucid and compact... distillation of an important policy debate. Booklist [The] combination of analytical rigour and empirical evidence makes this book a wonderful read as well as taking the optimist-pessimist debate to a new level of sophistication. -- Harsh Pant International Affairs Their able and articulate treatments of these issues do the reader a service by crisply laying out the competing perspectives. National Security Policy Proceedings Ganguly and Kapur provide a thoughtful analysis that enhances our understanding of nuclear dynamics in a vitally important region.Political Science Quarterly Political Science Quarterly