NPT Review Conference Ends Without Consensus Document as New START Expiration Leaves No Nuclear Arms Limits for First Time in 50 Years

Analysis
New START's expiration in February and the NPT's third consecutive review failure have together stripped all formal constraints from Russian and American nuclear arsenals, a gap the regime cannot close before 2031. US-Russia talks toward a New START successor are unlikely to begin by December 31, 2026; the final conference text dropped any call for bilateral negotiations, and neither government has signaled a pathway forward. Moderate confidence in this assessment rests on convergent reporting from the conference's closing session and on the absence of observable diplomatic signaling by either capital toward arms control engagement. Iran's role as both proximate cause of the conference failure and active US military adversary will continue displacing disarmament diplomacy in multilateral forums. The NPT's credibility against North Korean and Iranian proliferation now rests entirely on bilateral pressure tools, not treaty accountability.