The uneasy negotiations between the United States and Iran are unfolding under the shadow of a long historical truth: great-power systems rarely collapse in a single dramatic moment. They erode. They drift. They unravel—through hesitation, miscalculation, and the quiet accumulation of small crises that go unanswered until answering them becomes catastrophic.

The European descent into war in the 1930s remains the starkest example of how incremental provocations, when met with divided or delayed responses, can push nations toward a confrontation none of them originally sought. As the historian A.J.P. Taylor observed, WWII was a war that no one willed, planned, or wanted. Yet it came anyway, because those with the power to stop it chose ambiguity over clarity at every critical juncture.

The comparison with today is not moral. Iran is not Nazi Germany, and the multipolar world of 2026 is not the shattered post-Versailles order. But the incremental escalation and the seductive trap of strategic ambiguity echo with unsettling clarity.

The 1930s: A study in calibrated provocation

When Hitler came to power in 1933, he did not plunge Europe into war. He probed it. Step by step, test by test, each gamble bolder than the last and advanced because he was permitted to advance.

In 1936, German troops marched into the demilitarized Rhineland—a zone the Treaty of Versailles had explicitly forbidden them to enter. Hitler’s own generals warned him that Germany was unprepared for war; he reportedly told them to reverse course if France intervened. France did not intervene. Britain expressed concern. The gamble paid off.

In 1938, the Anschluss of Austria was carried out without resistance. The Sudetenland crisis ended at Munich with Neville Chamberlain’s infamous “peace for our time.”                By 1939, the dismantling of all Czechoslovakia revealed the truth that the historian Ian Kershaw would later crystallize: appeasement did not buy peace. It bought momentum.

By September 1939, when Hitler crossed into Poland, and the Allies finally drew a line, it was too late. The crisis had grown into something far more dangerous than it had been at the start—not because the Allies lacked intelligence or understanding, but because they lacked the will to act when the cost of action was still manageable.

The tragedy of the 1930s was not a failure of intelligence. It was a failure of clarity and resolve.

READ: Why Trump’s war on Iran will fail

The modern parallel: Incrementalism in the US–Iran standoff

The US–Iran confrontation today is shaped by a structurally similar logic. Iran does not seek open war. It probes. It tests. It advances in calibrated steps to shift the balance of power, while remaining below the threshold that would trigger a decisive American response.

Consider the pattern: increasing uranium enrichment to near-weapons-grade levels; installing advanced IR-6 and IR-8 centrifuges; restricting IAEA inspectors while stockpiling enriched material; expanding proxy networks across Iraq, Yemen, Syria, and Lebanon; probing American red lines through deniable attacks on US-linked assets. Each move is significant, and in theory, each move is reversible. Each move, as Chicago University Professor of Political Science Mearsheimer would frame it, is designed to maximize leverage while minimizing the risk of catastrophic retaliation.

“States that are not satisfied with the existing distribution of power are called revisionist states. They want to change the rules of the international order in their favor.” — John Mearsheimer, The Tragedy of Great Power Politics.

“States that are not satisfied with the existing distribution of power are called revisionist states. They want to change the rules of the international order in their favor.” — John Mearsheimer, The Tragedy of Great Power Politics.

Iran is a revisionist state operating within a system still dominated by American power. Its strategy is not suicidal boldness but patient, incremental pressure, similar to the pressure Hitler applied between 1933 and 1939. Not confrontation but erosion.

Meanwhile, Washington oscillates. Review the US sequence: Pressure, then diplomacy; withdrawal from the JCPOA, then attempted re-engagement; targeted strikes, then strategic restraint. Domestic divisions, shifting administrations, and the perpetual fear of a wider regional war have produced exactly what the 1930s produced: mixed signals that each side interprets differently. For the United States, it is a restraint. For Tehran, it reads as hesitation. What America calls prudence, Iran calls permission.

The result is a strategic ambiguity that serves neither side and emboldens the wrong calculations.

The risk of a modern “Poland moment”

The takeaway from 1939 isn’t the inevitability of war, but the fragility of systems.                     A structure can only withstand a finite number of shocks before a single miscalculation triggers a collapse that no one intended.

“Wars begin when governments believe the price of aggression is cheap.” — Robert Gilpin, War and Change in World Politics.

“Wars begin when governments believe the price of aggression is cheap.” — Robert Gilpin, War and Change in World Politics.

In the US–Iran context, analysts warn that such a moment could materialize through any one of three vectors: a nuclear threshold crossing that eliminates Washington’s strategic window; a miscalculated proxy attack that kills Americans in numbers that make restraint politically untenable; or an escalation in the Strait of Hormuz—the chokepoint through which roughly 20% of the world’s oil passes—that draws in regional actors faster than diplomacy can contain.

The ‘brinkmanship’ strategy with Iran: A calculated approach

None of these scenarios requires deliberate intent. Like the events of the late 1930s, they could emerge from accumulated misjudgements. If Tehran misreads American tolerance, Washington misreads Iranian resolve, or a third party triggers a spiral beyond Washington’s or Tehran’s control. As the political scientist Graham Allison warned in the context of great-power rivalry, the structural forces at play are often more powerful than the intentions of the actors within them.

“The Thucydides Trap is the severe structural stress caused when a rising power threatens to displace a ruling power.” — Graham Allison, Destined for War.

“The Thucydides Trap is the severe structural stress caused when a rising power threatens to displace a ruling power.” — Graham Allison, Destined for War.

Clarity as strategy—not confrontation as destiny

The 1930s teach a single, insightful lesson: ambiguity is not a strategy. It is a drift. And drift is what transforms manageable crises into unmanageable ones, local provocations into continental wars, and miscalculations into catastrophes.

For today’s policymakers, the historical imperative is to choose clarity over confrontation: clear boundaries, clear consequences, and clear diplomatic objectives. Negotiations with Iran may succeed or fail on their own merits. But they cannot succeed when conducted through wishful thinking, when red lines mean nothing, when each concession is rationalized as buying time rather than acknowledged as surrendering ground.

“You can always count on Americans to do the right thing—after they’ve tried everything else.” — attributed to Winston Churchill.

“You can always count on Americans to do the right thing—after they’ve tried everything else.” — attributed to Winston Churchill.

The European powers of the 1930s believed each concession would buy peace. In reality, each concession bought momentum—momentum toward a war they could have prevented had they chosen clarity over comfort even once, before it was too late.

The cost of clarity, then as now, is always lower than the cost of waiting for the next step.

The views expressed in this article belong to the author and do not necessarily reflect the editorial policy of Middle East Monitor.

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