Article Questioning the Effect of Nuclear Weapons on Conflict

We examine the effect of nuclear weapons on interstate conflict. Using more appropriate methodologies than have previously been used, we find that dyads in which both states possess nuclear weapons are not significantly less likely to fight wars, nor are they significantly more or less belligerent at low levels of conflict. This stands in contrast to previous work, which suggests nuclear dyads are some 2.7 million times less likely to fight wars. We additionally find that dyads in which one state possesses nuclear weapons are more prone to low-level conflict (but not more prone to war). This appears to be because nuclear-armed states expand their inter-ests after nuclear acquisition rather than because nuclear weapons provide a shield behind which states can aggress against more powerful conventional-armed states. This calls into question conventional wisdom on the impact of nuclear weapons and has policy implications for the impact of nuclear proliferation. Keywords nuclear weapons, nuclear proliferation, international conflict What effect do nuclear weapons have on interstate conflict behavior? Do nuclear weapons bolster the defense, deterring aggression and making states more secure? Or do nuclear weapons embolden the states that possess them, leading to conflicts tha