50 Years of Nuclear Restraint Ends Tomorrow

For the first time in more than half a century, the world's two largest nuclear powers will operate without mutual limits on their long-range arsenals.

Tomorrow, February 5, 2026, the last remaining nuclear arms control treaty between the United States and Russia expires. There will be no dramatic denouncement, no crisis summit, no eleventh-hour negotiation. The New START treaty, which has capped strategic nuclear warheads at 1,550 on each side since 2011—will simply cease to exist.

For the first time in more than half a century, the world’s two largest nuclear powers will operate without mutual limits on their long-range arsenals. And it’s happening not because of deliberate policy choice, but because of something far more mundane: political paralysis dressed up as strategic patience.

The Silence That Speaks Volumes

In September 2025, Russian President Vladimir Putin proposed that both sides informally agree to stick to New START’s warhead limits for another year while negotiating a successor treaty. It was a straightforward offer: maintain the status quo, buy time, keep talking.

President Donald Trump’s initial response seemed positive. “Sounds like a good idea,” he said publicly. That was four months ago.

Since then: nothing. No formal acceptance. No counter-proposal. No negotiation framework. Just silence.

The Kremlin reported as recently as this week that it’s still waiting for an official U.S. response. Russian officials have expressed confusion about the delay, noting that Putin’s proposal requires no Senate ratification, no complex verification regime, just mutual political commitment to existing limits both sides claim they’re already honoring.

Trump’s non-response isn’t strategic ambiguity, it’s indecision masquerading as deliberation. And tomorrow, that indecision becomes consequential.

What We’re Actually Losing

The expiry matters less because of the warhead numbers themselves, neither side has actually violated the caps, and more because of what sits underneath those numbers: a framework of transparency and mutual restraint that’s been in place since 1972.

Once New START is gone:

Verification vanishes. On-site inspections were already suspended in 2023, but at least the legal structure was still there. After tomorrow, even that’s gone.

Data sharing stops. The twice-yearly updates on warhead counts and missile locations weren’t just paperwork, they reduced the chances of fatal miscalculation. Now each side goes back to relying solely on intelligence that might be wrong, with no obligation from the other side to correct the record.

The political signal flips. The treaty said, implicitly: we both know unconstrained competition is bad for everyone. Its death says the opposite. Limits are optional. Agreements don’t matter. Arms races are back on the menu.

For the first time since 1969, the U.S. and Russia will have no constraints on their strategic arsenals. We’re walking into unmapped territory.

The China Trap

So why won’t Trump just take Putin’s offer? One word: Beijing.

Trump’s been adamant since his first term that any new arms control has to include China. And he’s not wrong about the basic facts; China’s arsenal is growing fast. They’re at 500+ warheads now, headed toward 1,000 by 2030. From Trump’s perspective, capping U.S. and Russian arsenals while China builds freely makes no sense.

Fair enough. The world has changed since 2010.

But here’s the problem: China has absolutely zero interest in sitting down for arms control talks. Their position is straightforward: our arsenal is still way smaller than yours, so why should we freeze it? And they have a point.

Meanwhile, Russia says fine, we’ll talk trilaterally, but only if British and French nukes are on the table too. The U.S. and Europeans immediately reject that.

So you’ve got a three-way standoff where everyone’s demanding the other guys make the first concession. Trump’s betting he can force both Russia and China to the table by letting New START expire and threatening an unlimited U.S. buildup. Except there’s zero evidence this pressure campaign is working. China’s not budging. Russia’s perfectly happy to build more weapons if that’s the game we’re playing.

And meanwhile, the one functioning treaty we have is about to die.

Death by Bureaucratic Neglect

New START’s demise is particularly frustrating because it’s not the result of irreconcilable differences. It’s dying because no one prioritized keeping it alive.

The treaty allowed only one extension, which happened in 2021. Everyone knew a successor was needed. But negotiations never materialized. Biden focused on Ukraine, making arms talks politically difficult. Trump’s return brought demands for Chinese inclusion that complicated matters further.

We’ve reached expiry with no replacement, no negotiations, and no agreement on what a future framework should address. Both sides support arms control in principle. Neither did the diplomatic work to make it happen.

The Arms Race Logic

Some downplay immediate impact, noting neither side can rapidly expand arsenals. They’re right technically, deploying hundreds of additional warheads takes at least a year.

But this misses the point. The danger isn’t immediate increases in the arsenal. It’s the strategic logic unconstrained competition creates.

Without limits, each side must plan based on worst-case assumptions. If Russia could deploy 3,000 strategic warheads, the U.S. must assume it will. Russia makes the same calculation. This creates a security dilemma where defensive buildups trigger offensive responses, spiraling into an arms race neither wants but both feel compelled to pursue.

The Burevestnik Problem

Even if Trump negotiates, any successor faces challenges that didn’t exist in 2010. Russia has developed “exotic” systems: the Burevestnik nuclear-powered cruise missile, Poseidon nuclear torpedo, hypersonic glide vehicles. These don’t fit traditional categories.

Any comprehensive successor would need to address short- and intermediate-range systems, exotic delivery methods, China’s arsenal (if Beijing participates), British and French forces (if Russia insists), and new technologies like hypersonics and AI.

This requires years of technical negotiation and sustained diplomatic effort. None of that is happening.

Our Take: Indecision at the Nuclear Brink

Trump’s silence on Putin’s nuclear treaty extension isn’t strategic patience. It’s paralysis born of contradictory impulses. He wants a “better deal” including China, politically impossible short-term. He wants to appear tough on Russia, making Putin’s proposal look weak domestically. He wants to preserve nuclear superiority, meaning no future constraints.

These goals are incompatible with maintaining existing arms control. So Trump does nothing, waiting for conditions to magically align.

This isn’t happening. China isn’t interested. Russia would rather build weapons. European allies won’t offer their arsenals. And while everyone waits, the only functional treaty expires.

The weird thing is that Putin’s September proposal—just informally stick to the existing limits for one more year—actually lines up with what Trump says he wants. It would buy time for the kind of complex, multilateral negotiations a new treaty would require. It would show both sides are serious about preventing an arms race. It would even create breathing room to try bringing China into the conversation, however unlikely that seems.

But accepting it would mean Trump has to do something he hates: take yes for an answer when it’s not the perfect answer he’s imagining.

And so tomorrow, more than 50 years of continuous nuclear arms control just… ends. Not because there’s a war. Not because the two sides have irreconcilable differences. It ends because the pursuit of some hypothetical better deal got in the way of keeping the actual deal we had.

The last time the U.S. and Russia operated without any mutual limits on this stuff was 1972. The world was a lot simpler then—two superpowers, clear lines, relatively primitive weapons. Now we’re heading back into that unregulated space, except this time with hypersonic missiles, autonomous systems, cyber vulnerabilities, half a dozen nuclear powers, and active shooting wars in Ukraine and the Middle East.

And we’re doing this not because anyone sat down and decided it was the smart move, but because we just… didn’t decide anything at all. That’s not a strategy, that’s negligence. And with nuclear weapons, negligence kills, it just takes longer than the bombs do.

Rameen Siddiqui
Rameen Siddiqui
Managing Editor at Modern Diplomacy. Youth activist, trainer and thought leader specializing in sustainable development, advocacy and development justice.