Overview

For decades, the United States has led the effort to stem the spread of nuclear weapons, both among potential adversaries and among its allies and partners. The current state of deterrence and of the nonproliferation regime, however, is open to many doubts. What happens if the nonproliferation regime should break down altogether? What happens if extended deterrence should fail, and allies no longer believe in the credibility of the U.S. nuclear umbrella? What happens when the world has not 9 but 11, 15, 18, or even more nuclear powers? This study explores how such a world might function and what it would mean for our present conceptions of deterrence, for the place of the United States in the international order, and for international order itself.

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9781442259690

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Clark Murdock is a senior adviser with the International Security Program at CSIS. Thomas Karako is a senior fellow and director of the Missile Defense Project at CSIS. Ian Williams is an associate fellow with the Missile Defense Project at CSIS. Michael Dyer is a research intern with the International Security Program at CSIS.

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