Nuclear Backfire: Iran Closer than Ever to Bomb, And War May Be Why
In an interview with ‘Atlantic Lens’, MIT security expert Jim Walsh warns why a “war of wills” is ricocheting, pushing Tehran to an irreversible nuclear decision as the NPT Review Conference begins.
For decades, the goal of U.S. pressure on Tehran was to keep the “horse in the barn.” This kept Iran operating in a position experts call “latency” - maintaining the technical capacity to build a weapon without ever crossing the line. For over 50 years, that “basic bargain” was anchored by the Non-Proliferation Treaty (NPT), the bedrock of global security currently under a five-year review that began this week in New York.
But according to Jim Walsh, a leading nuclear weapons expert at MIT, the current war has achieved the exact opposite. By threatening the very existence of Persian civilization, the U.S. has triggered a conflict that is pushing Iran to abandon its strategic ambiguity and finally reach for the one thing that ensures survival: the bomb.
As Walsh puts it, Iran today is “the thresholdiest state of the threshold states… they need only inch across, and they will have crossed the line to nuclear weapons.” While the risk of a breakout was real a decade ago, Walsh warns that the facts on the ground in 2026 have shifted the math.
“That was true in 2013,” Walsh says. “It’s certainly too true in 2026, but in spades.”
The concern is no longer just how close Iran is, but how its calculus is changing under the weight of current military pressure.
“Military force, you can use it to threaten and get countries to try to agree, but it’s a weird way to achieve an objective, because you’re making them feel vulnerable, which makes them want to have the bomb,” Walsh tells Atlantic Lens about the current strategy. “It reinforces the reason why they would want it in the first place.”
There is NO military solution
Having spent two decades in direct dialogue with Iranian leaders, Walsh offers a rare window into how Tehran is thinking at a moment of maximum pressure.
If pressure is the strategy, its limits are already visible.
“There’s no military answer here,” Walsh says plainly.
The reason is structural:
“You can blow up a bunch of buildings, but you can’t bomb the knowledge and experience of Iranian engineers and technicians out of their heads.”
After decades of development, Iran’s nuclear program is no longer just physical infrastructure, it’s human capital. That makes it resilient in ways airstrikes can’t undo.
🚨 Full conversation with Jim Walsh: Podcast +YouTube Channel
“Inflection Point”: This War Is Different
The war involving Iran has entered a phase that is no longer defined by escalation alone, but by something more enduring: a test of limits, strategy, and resolve. What is unfolding is not simply another chapter in a long history of U.S.-Iran confrontation. It may be the moment that breaks from it. After two decades of direct engagement with Tehran’s leadership, Jim Walsh sees a fundamental shift underway, one that could reshape not only Iran’s posture in the region, but the logic of deterrence itself.
“We’ve reached an inflection point… it’s hard to imagine Iran returns to the pre-war country… I think we’ll look back on this as the point in which everything changed in the region.”
This is a “war of wills”
At the center of this shift is what Walsh describes as a “war of wills,” or a confrontation less about battlefield gains than about endurance and political thresholds:
“We’ve cycled through five different justifications... and none of them have held up. It’s a war of wills because it’s a question of who can put up with the punishment and the suffering more… who will give in first.”
That framing is echoed in Washington’s most influential policy circles. As Michael O’Hanlon, Director of Foreign Policy Research at the Brookings Institution and a leading authority on U.S. defense strategy, told Atlantic Lens, the current confrontation has devolved into a raw test of endurance:
“Whose blockade can be more effective, and who can better tolerate the pain the other inflicts?”
This points to something more structural: both sides are now testing not just each other’s capabilities, but their capacity to absorb pressure over time. From Washington, the strategy leans on sustained military coercion. From Tehran, the response appears to be one of consolidation and resistance, even amid internal strain.
In this environment, the very definition of “victory” has decoupled from reality. As Walsh points out, there is a dangerous gap in perception: “Iran thinks it has already won.” By surviving the “shock and awe” phase without collapsing, Tehran has validated its own strategy of resistance.
The risk now is that a dynamic designed to force concessions is instead hardening positions in ways that are far more difficult to unwind.
Why Tehran is in State of Survival
If this is a war of wills, then Tehran is thinking in terms of survival, and that changes everything.
“There’s nothing worse you can do to a country than threaten the existence of the state,” Walsh says. “When states are in fights for survival, they’re all in.”
That pressure tends to unify. Internal divisions, long a feature of Iran’s political system, don’t disappear, but they get suppressed. The system closes ranks.
Still, the fractures haven’t vanished. “Iran is one of the more fractious polities,” Walsh notes, pointing to competing factions now operating without a fully consolidated leadership structure. The result is a system that is both unified in purpose and unstable beneath the surface.
In that environment, the balance shifts. “You don’t attack people and then expect the doves to win the argument at the table,” he says. Diplomacy doesn’t disappear, but it weakens. Hawks gain ground, even as the need for a deal remains.
And that’s the contradiction: Iran is both more resistant and more constrained. It can absorb pressure, but not indefinitely. “They need some sort of agreement,” Walsh says. The question is on whose terms, and when.
The War Endgame
At some point, this ends. The question is how.
“There are two ways this thing ends,” Walsh says. “Either it ends with an agreement, or it ends where the U.S. just walks away.”
Neither path is clean. An agreement would likely be partial, improvised, and politically fragile. Walking away would leave the underlying conflict unresolved.
In both cases, time matters. “While they wait… the costs will continue to increase day by day,” he says.
Which is why, ultimately, the signal to watch isn’t the next strike or incident, but whether talks resume in a meaningful way.
“They’ll do it eventually,” Walsh says.
The uncertainty is how much the world changes before they get there.
Listen to the podcast with my full conversation with Jim Walsh or watch the video version on the ‘Atlantic Lens’ YouTube Channel.
