A decades-old bulwark against global catastrophe is crumbling. This Thursday marks the expiration of the New START treaty, a landmark agreement that has, for thirty years, imposed limits on the nuclear arsenals of the United States and Russia. The world is now entering a chillingly unfamiliar era – one without legally binding constraints on the most destructive weapons ever created.
The treaty’s demise forces a fundamental reassessment of nuclear strategy in both Washington and Moscow. For years, both nations planned their modernization efforts assuming the other would adhere to established limits. That assumption is now gone, replaced by a dangerous uncertainty that compels each side to prepare for the worst-case scenario.
Russia suspended its participation in New START last year, halting crucial inspections and data exchanges. But the expiration of the treaty itself removes the final legal framework governing the size of their nuclear forces, opening the door to a new arms race. The immediate consequence isn’t necessarily a surge in weapon *building*, but a heightened risk of existing warheads being rapidly deployed.
The Biden administration has stated it won’t pursue further arms control without China’s involvement, citing Beijing’s rapidly expanding nuclear stockpile. However, experts are deeply skeptical that China will agree to limit its weapons until it reaches parity with the U.S. and Russia – a goal it’s actively pursuing, aiming for 1,000 warheads by 2030.
Despite China’s growth, the nuclear landscape remains dominated by the aging superpowers. The U.S. and Russia still control approximately 86% of the world’s roughly 12,000 nuclear warheads, each possessing around 4,000 total weapons, with nearly 1,700 deployed. This represents a dramatic decline from the 70,000 warheads that existed in 1986, but the current situation is far more precarious.
While Russia initially floated the idea of a one-year extension, analysts believe this was driven by practical constraints. Its ongoing war in Ukraine has severely strained its industrial capacity, making a rapid arms buildup difficult. Modernizing its existing arsenal is proving challenging enough.
The absence of inspections and data exchanges is particularly alarming. Without the ability to verify the other side’s actions, both countries are forced to rely on intelligence gathering, fostering mistrust and encouraging worst-case planning. This creates a self-fulfilling prophecy, where fear drives escalation.
Experts warn that Russia could move faster than the U.S. in deploying more warheads by “uploading” them onto existing missiles. This process, while not instantaneous, could potentially double their deployed arsenal within a couple of years. However, the U.S. faces its own limitations, lacking the production capacity to sustain a significantly larger arsenal over the long term.
The U.S. nuclear weapons complex is currently unable to meet even a fraction of its Cold War-era production levels, particularly when it comes to producing key components like plutonium pits. Russia, while facing challenges in delivery systems due to the demands of the war in Ukraine, appears to be more adept at warhead production.
Perhaps more concerning than a buildup of traditional, treaty-covered forces is Russia’s investment in novel nuclear systems – those that fall outside existing arms control frameworks. Weapons like the Poseidon nuclear-powered torpedo and nuclear-powered cruise missiles represent a new and unpredictable threat.
The specter of nuclear testing has also resurfaced. Former President Trump has repeatedly called for the U.S. to resume testing, arguing it’s necessary to counter the advancements of Russia and China. He warned that a world where nuclear weapons are needed is a world teetering on the brink of “oblivion.”
The expiration of New START isn’t simply a policy failure; it’s a dangerous turning point. It signals a return to a more volatile and unpredictable nuclear landscape, one where the risk of miscalculation and escalation is significantly higher. The world now faces a future where the specter of nuclear war looms larger than it has in decades.
