How Regimes Fall
The Precedents: How Power Erodes
Every revolution follows its own course, but the mechanics of regime erosion are remarkably consistent across cases. Before turning to Iran’s specific situation, it is worth cataloging what actually happened — in granular, factual detail — during the critical hours and days when seemingly permanent regimes came apart.
Iran, 1978–1979. The revolution that created the Islamic Republic unfolded over thirteen months, beginning with student protests in January 1978 after a Tehran newspaper published articles perceived as slandering Ayatollah Khomeini. By August, strikes had spread to the oil sector. In September, the Shah declared martial law; troops opened fire on protesters in Jaleh Square on what became known as Black Friday, killing dozens. Rather than crushing dissent, the massacre radicalized the movement. By November, oil workers had walked out entirely, cutting off the regime’s revenue. Workers timed nightly power cuts to interrupt the Shah’s televised addresses. In December, as many as nine million Iranians took to the streets across the country in largely nonviolent protests[1] — the largest demonstrations in Iranian history until 2026. The Shah’s own prime minister was discovered transferring assets to Swiss accounts, signaling to the military that the inner circle had already decided the regime was finished. On January 16, 1979, the Shah boarded a plane and left Iran. On February 1, Khomeini returned from fifteen years of exile and was greeted by several million people. On February 11, the armed forces declared themselves “neutral,” and the Pahlavi dynasty collapsed. The entire sequence — from the military’s declaration of neutrality to the end of 2,500 years of Iranian monarchy — took less than 48 hours.
Romania, 1989. Nicolae Ceaușescu’s regime appeared invulnerable as late as November 20, 1989, when he was unanimously reelected as Communist Party general secretary — the same day Czechoslovakia’s communist leadership resigned. The trigger was small: on December 15, the Securitate attempted to evict an ethnic Hungarian pastor, László Tőkés, from his parish in Timișoara. Thirty parishioners showed up to block the eviction. Within two days, the crowd had swelled to tens of thousands and the chants had shifted from defending a pastor to demanding the end of the regime. Ceaușescu ordered his forces to fire. Troops killed approximately 100 people in Timișoara between December 17 and 20[2]. On December 21, Ceaușescu organized a massive rally in Bucharest — workers bused in, given flags, told when to applaud. It was broadcast live on state television. Mid-speech, sections of the crowd began to boo. The cameras captured Ceaușescu’s face — confusion, then fear. His security hustled him off the balcony. Every Romanian watching understood: the man who had ruled for 24 years had lost control of a scripted event. The next morning, Defense Minister Vasile Milea was found dead in what was reported as a suicide. His death triggered mass military defection. By 12:06 PM on December 22, Ceaușescu and his wife were fleeing the Central Committee building by helicopter, the pilot having been summoned only 46 minutes earlier. They were captured in Târgoviște, tried by military tribunal on Christmas Day, and executed. Total elapsed time from the failed speech to the dictator’s flight: approximately 18 hours.
Egypt, 2011. President Hosni Mubarak had ruled for 30 years and commanded a military of 468,000 active personnel. On January 25, inspired by the Tunisian revolution weeks earlier, tens of thousands gathered in Tahrir Square. The regime deployed riot police and cut internet and mobile service nationwide — an unprecedented blackout affecting 80 million people. It failed. Protesters organized through word of mouth and printed leaflets. By January 28 (“Friday of Rage”), police had been overwhelmed, and the military was deployed to the streets. Here the critical distinction emerged: the Egyptian military saw itself as an institution separate from any individual president. Senior commanders had relationships with their American counterparts through decades of $1.3 billion in annual military aid[3]. The Supreme Council of the Armed Forces met without Mubarak and concluded he was finished. On February 1, Mubarak offered not to run for reelection. The crowd rejected it. On February 10, he delegated powers to Vice President Suleiman but refused to leave. The next day, Suleiman appeared on television to announce Mubarak had stepped down and transferred authority to the military. Eighteen days from the first protest to the fall of a president. The military had fired almost no shots.
Libya, 2011. Colonel Muammar Gaddafi had ruled for 42 years and built his security apparatus around tribal loyalty rather than professional institutions. When protests erupted in Benghazi on February 15, security forces fired on demonstrators almost immediately. Unlike Egypt, Libya had no institutional military that could broker a transition — Gaddafi had deliberately kept the army weak, relying instead on paramilitary brigades led by his sons and tribal allies. Units from non-favored tribes defected en masse; the Warfalla tribe, Libya’s largest, abandoned Gaddafi within the first week[4]. Entire cities — Benghazi, Misrata, Tobruk — fell out of government control within days. But the regime’s tribal core held, producing not a quick transition but a grinding civil war. NATO intervened with airstrikes on March 19. Gaddafi was captured and killed by rebels on October 20 — eight months after the first protest. The lesson: when a regime’s security forces are built on personal and tribal loyalty rather than institutional identity, they fragment rather than collectively switching sides, producing prolonged conflict.
Syria, 2011. Bashar al-Assad inherited his father’s regime along with its deliberate strategy of stacking the officer corps with Alawites, who represented roughly 12% of Syria’s population but occupied a vastly disproportionate share of senior military positions. When protests broke out in Daraa in March 2011, the regime responded with lethal force from the beginning. Some Sunni conscripts defected — forming the nucleus of what became the Free Syrian Army — but the Alawite-dominated command structure held. Officers understood that their fate was bound to the regime: in a Sunni-majority country where sectarian reprisals were a real possibility, defection meant not just career risk but existential danger. The result was the opposite of Egypt’s clean break: a devastating civil war that killed over 500,000 people[5] and displaced half the population. Assad’s regime survived until December 2024, when a rapid rebel offensive finally toppled it — thirteen years after the first protests.
The Soviet Union, 1991. The dissolution was not a single revolution but a cascade of institutional failures. The August 1991 coup by Communist hardliners against Mikhail Gorbachev lasted three days. The plotters had tanks and the KGB but lacked coordination and conviction. Tank crews in Moscow refused to fire on civilians surrounding the Russian White House. Boris Yeltsin climbed atop a tank and declared the coup illegitimate — an image broadcast worldwide that crystallized the regime’s impotence. The Alpha Group, the KGB’s elite special forces unit, received orders to storm the White House but refused to carry them out. Within days, Gorbachev returned to power but the Communist Party was finished. Between August and December, every Soviet republic declared independence. The Soviet Union formally dissolved on December 25, 1991 — four months after a failed coup by men who had every instrument of state violence at their disposal but could not get enough people to use them.
The pattern across all of these cases is not that security forces defect because they sympathize with protesters. It is that they defect when they conclude the regime can no longer protect them, reward them, or survive. The trigger is a visible demonstration of weakness — a balcony speech that goes wrong, a military council that meets without the president, a defense minister who dies under mysterious circumstances, a prime minister caught moving money abroad. Each of these moments functions as what game theorists call a focal point: a publicly observable event that allows thousands of individuals to simultaneously update their private calculations about which side is going to win. The question for Iran in March 2026 is whether the killing of Khamenei, the destruction of the SNSC, and the bombing of the Assembly of Experts have already provided that focal point — or whether the IRGC’s institutional depth and economic entrenchment will prove more resilient than the Shah’s personalized regime, Ceaușescu’s hollow dictatorship, or Mubarak’s brittle military presidency.
The Anatomy of Collapse
On the evening of February 28, 2026, the compound that had housed Ali Khamenei for over three decades was reduced to rubble. Within hours, Iranian state media confirmed the Supreme Leader was dead. The Assembly of Experts was bombed while convening to choose a successor. The Supreme National Security Council headquarters was destroyed.
No regime in modern history has lost this much of its leadership apparatus in a single 72-hour period while simultaneously fighting an external war and managing the aftermath of its largest domestic protest movement in 46 years. The Islamic Republic now faces a question that every authoritarian system eventually confronts but few survive: can a body function after the head is severed?
The historical answer is: it depends. Regimes are not individual rulers. They are interlocking systems of institutions, incentives, loyalties, and fears. The IRGC, with roughly 190,000 personnel[1], the Basij paramilitary embedded in every neighborhood, and the parallel intelligence apparatus were all built precisely to survive decapitation.
But survival is not the same as function. Those systems require coordination — a center of gravity that arbitrates between factions, allocates resources, sets direction, and, above all, sustains the fiction that the state is still coherent. That center no longer exists, and nothing in the Islamic Republic’s design anticipated its absence.
The Mid-Level IRGC Officer: A Study in Calculation
Consider a man we might call Major Sadegh — a mid-level IRGC ground forces officer at a garrison in Isfahan province. He is 38, married with two children. He joined at 19, partly from conviction and partly because it was the only reliable career path in a province hollowed out by sanctions.
Sadegh has killed no one. He never fired on a protester. But he has been part of the apparatus. He attended the ideological sessions. He signed orders that routed supplies to units that did fire on protesters in January. He knows that in any transitional justice scenario, his name is on documents.
Tonight, as American B-2s conduct their fourth day of strikes, Sadegh is doing what every mid-level officer in every crumbling authoritarian military has done throughout history: quietly testing the air. At dinner in the officers’ mess, he says something carefully ambiguous — something like, “Whatever happens, the most important thing is that Iran survives.” It is a sentence that means nothing and everything. A loyalty test disguised as a platitude.
He watches who nods. He watches who changes the subject. He watches who, in the fractional pause before responding, reveals that they too are calculating.
This is the same calculus that played out in Egyptian mess halls in January 2011, when officers began using the phrase “the army and the people are one hand” — readable as loyalty to Mubarak or to the nation he claimed to represent. The same calculus unfolded in Romanian Securitate barracks in December 1989, when officers watched Ceaușescu’s disastrous final balcony speech and realized the man they served had lost the capacity to govern.
The critical variable is not whether Sadegh wants to defect. It is whether he believes others will defect with him. Defection from an authoritarian security apparatus is a coordination problem. Any individual who defects alone faces death. But if enough defect simultaneously, the apparatus transforms — it ceases to be the old regime’s instrument and becomes the nucleus of whatever comes next.
Chenoweth and Stephan’s study of a century of resistance campaigns found that security-force defections are among the strongest predictors of a campaign’s success: when loyalists begin to peel away, the probability of regime change rises sharply[1]. The defection is the tipping mechanism. Everything else — protests, external pressure, economic collapse — merely sets the conditions for it.
The Mayor of Khorramabad: Loyal to What, Exactly?
Now consider Mr. Karimi, the mayor of a small city in Lorestan province — a region with fierce anti-regime sentiment, where security forces killed dozens during January protests and clashes left at least ten IRGC personnel dead.
Karimi is nominally pro-regime. Appointed through the system. Attended the right meetings. But he is also practical. He has to keep water running to 120,000 people, ensure bread subsidies reach bakeries, manage a municipality whose tax base has been devastated by sanctions, whose young people are overwhelmingly hostile, and whose tribal elders make clear their cooperation depends on the government not pushing too hard.
With Khamenei dead and bombs falling on Tehran, Karimi receives contradictory orders from the provincial governor’s office, the local IRGC intelligence unit, and the Interior Ministry — all receiving contradictory guidance from a capital in chaos. He is told simultaneously to maintain order, enforce a blackout curfew, and organize pro-regime rallies. He has resources for perhaps one of these.
What Karimi does next matters enormously. In every revolutionary scenario, from the French Revolution to the Arab Spring, mid-level civilian administrators have been among the most underappreciated variables. These people actually run the state at the local level. When they stop carrying out orders — or selectively implement only those that don’t antagonize their communities — the regime’s writ evaporates from periphery inward.
In 1979, this unfolded over months. Provincial governors stopped relaying SAVAK orders. Municipal officials negotiated with local clerics representing the opposition. The regime didn’t collapse because the Shah lost Tehran. It collapsed because his authority dissolved in a thousand small cities where men like Karimi calculated that the old system was no longer worth defending.
The Bazaari: Money Moves Before Armies Do
The third figure is Mrs. Tehrani — a prosperous merchant whose family has traded carpets and textiles in the Isfahan Grand Bazaar for three generations. She is wealthy by Iranian standards. Through hawala networks, she had moved a portion of her assets to Dubai — until Dubai’s airport was hit by Iranian drones.
The bazaar class has always been the bellwether of Iranian political transitions. They bankrolled the 1979 revolution. Their 1978 strikes paralyzed the economy and demonstrated to the military that the Shah could not maintain basic economic order. And it was bazaaris who began the current crisis in December 2025, when Tehran’s Grand Bazaar shuttered over the rial’s collapse.
Mrs. Tehrani supported the protests passively — she closed her shop, didn’t attend pro-government rallies. But she hedged, maintaining IRGC-connected business partners. The IRGC controls an estimated 20-40% of Iran’s economy through construction, engineering, telecom, and import-export enterprises[1].
Now, with the regime decapitated and the economy under simultaneous bombardment and paralysis, she is doing what her class has always done in radical uncertainty: converting assets to gold and hard currency, calling every contact outside the country, talking carefully with other bazaaris about what comes next.
Public U.S. signaling that Iranian officials are moving money abroad — that the regime’s own elite is, in effect, abandoning ship — is the financial corollary. When elites move money, it tells everyone below them that the people with the best information have already decided. In 1978, the Shah’s own prime minister was caught transferring assets to Swiss accounts months before the revolution. It was the single most devastating signal to the military that the old order was doomed.
Historical Patterns: When the Security Forces Break
Revolutions succeed or fail on one variable above all others: whether the security forces stay loyal. Lenin put it plainly more than a century ago — no revolution triumphs until a portion of the armed forces that sustained the old regime comes over to its side[1].
In Egypt in 2011, the Supreme Council concluded within days that Mubarak was finished. The military’s institutional identity was separate from the regime — it saw itself as guardian of the nation, not the president. When generals announced they would not fire on protesters, the revolution was over. Mubarak fell within 18 days.
In Romania in 1989, the apparatus initially obeyed orders. Over a thousand died. But when Ceaușescu’s final speech devolved into visible chaos — the crowd booing, the dictator’s confusion broadcast live — security forces defected instantaneously. The critical moment was the demonstration of helplessness: once everyone could see the leader had lost capacity to project authority, the coordination problem resolved itself.
In Syria, Assad spent decades stacking the officer corps with Alawites (~12% of population), tying the military’s fate to the regime. The result was grinding civil war, not quick transition.
In Libya, the security forces fractured along tribal lines rather than switching sides as an institution. Non-favored tribal units defected en masse while Gaddafi’s family-led brigades fought to the end. The result was neither a clean transition nor a held regime, but eight months of civil war.
Iran’s dual structure — the regular Artesh (~420,000)[2] and ideological IRGC (~190,000)[3] — creates a unique dynamic. The Artesh is conscript-based, more institutionalized. The IRGC is ideologically driven, economically intertwined with the regime. The Artesh is the more likely candidate for neutrality.
But the IRGC is not monolithic. Its ground, naval, aerospace, and Quds Force have distinct cultures. Rank-and-file are disproportionately working-class and rural — the demographics most affected by crisis. The Basij, despite indoctrination, are volunteers in communities where neighbors are protesting. The question is whether enough constituent parts fracture to create openings.
The Whispered Conversation: How Defectors Find Each Other
One of the least understood aspects of regime collapse is how people within the security apparatus signal willingness to abandon their posts. In a system with pervasive surveillance — the IRGC’s intelligence monitors its own personnel relentlessly — any explicit disloyalty can mean execution.
So defection’s language is always coded. In Egypt’s military in 2011, junior officers shared jokes about Mubarak on private groups — not as political statements but as tests. If a colleague laughed, he might be safe. If he reported it, you’d know immediately. The joke was the minimum viable signal.
In Syria, conscripts wanting to desert asked trusted friends whether their family was “thinking about traveling” — innocuous words that could mean fleeing. The answer’s speed and manner revealed intentions.
In Iran, the January protests produced their own vocabulary. A Ministry of Interior official described his defection as simply responding to Reza Pahlavi’s call by staying home from work. The lowest-risk defection: not doing something, rather than doing something. But it was observed by colleagues who then had to decide what it meant.
Within the IRGC, officers wanting to signal openness to change use religious framing — invoking “the good of the nation” or “the will of God” in ways readable as loyalty or subtle distancing. The chant at funerals for slain protesters — “Death to Khamenei” — represents the moment coded speech gives way to open declaration.
With a decapitated regime under bombardment, signaling accelerates dramatically. The absence of a Supreme Leader creates a permission structure. “I am loyal to the Islamic Republic” is no longer the same as “I am loyal to the Supreme Leader,” because the Leader is dead and the Assembly of Experts was bombed during the selection process. Every officer can now frame doubt as legitimate uncertainty about the chain of command.
External Catalysts: What the U.S. and Israel Are Doing
The U.S. and Israel are conducting a parallel campaign to accelerate internal fracture, drawing from an established playbook of revolutionary catalysis.
First: decapitation. Killing Khamenei, destroying the SNSC, bombing the Assembly mid-session — targeted at command-and-control nodes. The goal is demonstrating the system can no longer protect its own leadership, a signal that cascades through every level.
Second: communications disruption. Strikes on IRIB, the state broadcaster, eliminate the regime’s unified narrative and create space for alternatives. Hackers had already broadcast Pahlavi’s defection calls on state TV during January protests.
Third: Trump’s direct address to IRGC[1] — “lay down weapons for immunity, or face certain death” — is a textbook amnesty offer, used with mixed success in Iraq 2003 and counterinsurgency contexts.
Fourth: activating ethnic opposition. Trump’s call with the KDPI president[2] signals to every minority — Kurds, Azeris, Baloch, Arabs — that external support is available. Simultaneous peripheral uprisings would force the IRGC to disperse when it needs to concentrate.
Fifth: economic strangulation. The Hormuz closure, ironically Iran’s own doing, cut its revenue. Washington’s public claim to be tracking the movement of regime officials’ money was itself a form of psychological operation: it told every insider that their escape routes were already being watched.
Historical parallels: during the Soviet bloc’s fall, Western services cultivated reformists within Party structures. Radio Free Europe undermined monopoly on truth. In Libya 2011, NATO demonstrated continued loyalty was futile. In Serbia 2000, Western-funded organizations coordinated demonstrations while backchannels with security commanders ensured they wouldn’t fire.
The crucial lesson: external military force alone doesn’t produce regime change from within. It shatters invincibility, disrupts command-and-control, raises the cost of loyalty. But the mechanism always requires internal actors deciding the old system is finished.
The Fork in the Road
Iran sits at the inflection point scholars of revolution call maximum uncertainty. The five conditions commonly identified as prerequisites for revolution[1] — fiscal crisis, divided elites, a broad opposition coalition, a convincing resistance narrative, and a favorable international environment — are present at once, and to a degree the Islamic Republic has not faced before.
But presence of conditions is not inevitability. Syria met many in 2011; the result was civil war. Libya met them; state collapse. Egypt met them; brief democratic opening followed by military restoration.
What makes Iran distinct is external military pressure combined with a pre-existing mass protest movement, in a country with living memory of successful revolution and an exile opposition with a recognized figurehead in Reza Pahlavi[2] — who, whatever his limitations, provides the kind of “convincing celebrity” scholars identify as crucial for resolving the coordination problem.
Which pattern Iran follows will be decided in the coming days, and the determining variable is the IRGC. If it holds together: prolonged resistance under a successor, most plausibly a military strongman. If it fractures: negotiated transition or chaotic collapse. If the ethnic periphery ignites while the center holds: territorial fragmentation.
In every scenario, the conversations happening right now — in garrison mess halls, in provincial offices, in bazaar back rooms, in encrypted chats — will matter more than the bombs. The bombs set conditions. The conversations determine the outcome.
Major Sadegh is still watching his colleagues at dinner. Mr. Karimi is still deciding which orders to follow. Mrs. Tehrani is still converting rials to gold. Somewhere in Tehran, in a damaged government building lit by emergency generators, someone with stars on their shoulders is staring at a phone, deciding whether to make a call that cannot be unmade.
That is how regimes fall. Not with a single thunderclap, but with ten thousand private decisions, each made in fear, each invisible until the moment they aren’t.