Assuming that the killing of Iran’s Supreme Leader Ali Khamenei would automatically topple the regime mistakes hope for analysis. The attack was undoubtedly historic—the most serious blow to the Islamic Republic since 1979—but whether the system collapses depends on how it was built to withstand shocks of this size.
The evidence suggests the regime was deliberately structured not to depend entirely on one person. The Islamic Republic is not a single-figure autocracy of the familiar Arab model, where the fall of a ruler can quickly bring down the state. Instead, it is a layered ideological and securitized order: a clerical leadership anchored to constitutional mechanisms, backed by security forces, and supported by bureaucratic and economic networks intended to preserve state continuity rather than merely serve an individual.
So the assassination did not by itself erase the state; it shifted the crisis from the survival of a single head to the survival of internal cohesion. The real danger is whether the system can hold together under the pressure of war, elite fractures, and external stress.
Constitutional rules were part of the design to handle a leadership vacuum. Article 111 provides for a provisional council to exercise the Leader’s powers until the Assembly of Experts elects a successor. After the announcement of Khamenei’s death, authority was temporarily handed to a three-person council—President Masoud Pezeshkian, judiciary chief Gholam-Hossein Mohseni-Eje’i, and cleric Alireza Arafi—while the 88-member Assembly of Experts retains responsibility for selecting the next supreme leader.
That legal framework functions as a survival protocol: it gives the state a visible route to continuity in moments of shock. But legal form alone does not determine outcomes; the distribution of power across institutions does. The regime draws strength from three overlapping sources.
First is religious legitimacy: the office of the Supreme Leader, the Assembly of Experts that legitimizes leadership, and bodies like the Guardian Council that enforce doctrinal boundaries. Succession is therefore both theological and political.
Second is the security-military sector, above all the Islamic Revolutionary Guard Corps (IRGC). The IRGC is the backbone of the state—responsible for internal security, regional strategy, and vast economic interests—not a conventional military that answers to the presidency.
Third is the political and administrative apparatus: the presidency, judiciary, ministries, and economic institutions that keep everyday state functions running and prevent total collapse.
Of these, the IRGC is the decisive element. Once the supreme leader was killed, the crucial question was whether the IRGC would remain cohesive and maintain control. The IRGC is not subordinate to the president in the usual sense; it is the guardian of the revolutionary order and has autonomy and reach across society and the economy.
The combination of ongoing war and losses among senior commanders has pushed the IRGC toward tighter control of decision-making while delegating operational authority downward so mid-level commanders can act quickly. In effect, the state lost its head but kept functioning limbs.
Experience and current signals make a rapid collapse unlikely. Ideological regimes often consolidate under external threat rather than fragment immediately; the assassination can prompt short-term unity, hard-line postures, and intensified repression rather than disintegration. Many opposition figures abroad have acknowledged that a single strike—even a dramatic one—is rarely enough to topple a regime without broader, internal shifts.
That said, survival does not mean stability or resilience. The regime may endure while becoming more exhausted, insular, and brittle—particularly if succession falls to figures closely tied to the late leader, such as his son Mojtaba Khamenei. The most likely trajectory is continued rule coupled with diminished flexibility.
War highlights and reshuffles internal fault lines. A state that survives a mortal blow often responds by choosing security over openness: it narrows political space, deepens suspicion, and treats dissent as a security threat. Early signs include strains between hardliners aligned with the IRGC and comparatively less hardline currents around President Pezeshkian, especially after controversy over his remarks on pausing attacks in the Gulf. Some hardline clerics have urged a rapid selection of a new supreme leader, reflecting discomfort with temporary arrangements during an active conflict.
These tensions are not collapse, but they expose anxiety within the system. The regime faces a tough environment: war, assassination, international pressure, battlefield losses, elite splits, and the fear of defections. The constitutional mechanism exists, but how effectively it operates under these stresses is the real test.
In short: Iran’s regime does not currently appear on the verge of immediate collapse, but it is unlikely to emerge from this war unchanged. The most probable outcome is endurance at a high price—greater reliance on the IRGC, constricted political space, harsher repression, and reduced adaptability.
Put another way, this conflict may not finish the regime, but it may finish what remained of its flexibility. That rigidity can sustain rule in the short term while accelerating an internal decline that weakens the state over time. For now, Iran faces a paradox: it survives, but into a new phase of anxious rigidity that could protect it today and erode it tomorrow.
The Arabic version of this article was first published by Al Jazeera Arabic.
The views expressed here are the author’s own and do not necessarily reflect Al Jazeera’s editorial stance.