How conventional arms control failures caused the Russo-Ukraine War

What role did conventional arms control (CAC) agreements failures play in Russia's decision to invade Ukraine? Using a process tracing and counterfactual mixed methodology analyzing Russia's invasion motivations, this article attempts to answer the question by assessing Russian strategic policies, proposals, and arms control agreements. These demonstrate that Russia, seeing its sense of “indivisible security” being violated, sought to adjust or establish new CAC agreements to address a growing conventional military imbalance between NATO and Russia. Having failed to establish a fixed and stable conventional military balance through CAC, and as Ukraine edged closer to NATO membership, Russia resorted to the use of force shortly after their December 2021 proposals were not accepted. The article concludes by suggesting that this case supports arms racing and arms-control related causes of war theories, and that dissonant perceptions of the actual or ideal military balance can lead to conflict.