Conventional Wisdom? The Effect of Nuclear Proliferation on Armed Conflict, 1945-2001

Abstract

The possession of nuclear weapons confers many benefits on a state. The path to proliferation, however, is often violent. When a state initiates a nuclear weapons program, it signals its intent to fundamentally alter its bargaining environment. States that once had an advantage will now be disadvantaged. This change in the environment is not instantaneous, but evolves slowly over time. This gives states both opportunities and incentives to resolve underlying grievances, by force if necessary, before a nuclear weapons program is completed. Our cross-national analyses of nuclear weapons program and the onset of militarized conflict confirm this expectation. In particular, the closer a state gets to acquiring nuclear weapons, the greater the risk it will be attacked (especially over territorial issues). Once nuclear weapons are acquired, however, the risk of being attacked dramatically drops, though not below the risk of attack for non-proliferators. © 2012 International Studies Association.