The assassination of Supreme Leader Ali Khamenei was a seismic event, but it did not automatically implode the Islamic Republic. Treating the killing as synonymous with instant collapse is wishful thinking rather than sober analysis. The decisive question is not whether the blow was severe, but whether the system was constructed to absorb such a shock.
From its founding the Islamic Republic was organized to outlast any single individual. It is not a personalised autocracy whose survival hinges solely on one head. Instead it is a layered, securitised and ideological state in which constitutional mechanisms, security organs and bureaucratic networks work to preserve the system itself rather than to serve one person.
Constitutional contingency is explicit. Article 111 sets out a temporary transfer of leadership if the post becomes vacant, and the Assembly of Experts is mandated to choose a new leader as soon as possible. After the announcement of Khamenei’s killing, a three-man council temporarily assumed leadership duties: President Masoud Pezeshkian, judiciary chief Gholam-Hossein Mohseni-Ejei, and Guardian Council member Alireza Arafi. The Assembly of Experts, an 88-member body, holds the authority to appoint the successor. This built-in protocol acts as a survival mechanism to keep core state functions running during maximum shock.
But constitutional text alone is not decisive. What matters more is the balance of power across three overlapping layers that sustain the regime.
1) Religious legitimacy. The Supreme Leader’s office, the Assembly of Experts and the Guardian Council provide doctrinal authority. Succession is not merely administrative; it is a struggle over legitimacy, theology and political authority.
2) Security and military forces. The Islamic Revolutionary Guard Corps is the regime’s backbone. It is not a conventional military subordinate to the presidency. The IRGC controls internal security, significant regional operations, economic interests and patronage networks. Its cohesion and choices matter more than any constitutional paragraph.
3) Political bureaucracy. The presidency, judiciary, ministries and economic institutions perform daily governance. They prevent immediate state fragmentation by continuing routine functions.
Among these, the IRGC is the decisive actor. The central question after the assassination became less about legal mechanisms and more about whether the IRGC would stay unified. Reports indicate the IRGC tightened its control following the strike, relying on operational decentralisation and empowered mid-level commanders to maintain momentum despite losses among senior officers. In practice the body continued to command security, manage regional responses and protect key domestic interests.
That resilience helps explain why the regime has not collapsed. Military targeting of leadership can wound the system, but it does not necessarily paralyse it when institutional redundancy and security networks remain intact. Indeed, historical experience shows that ideological regimes under external threat can harden and rally rather than disintegrate quickly. Some elements of the opposition abroad have acknowledged that bombing alone does not produce political change; sustained internal dynamics are required.
However, survival does not equal strength. The aftermath of the assassination revealed stress points: elite divisions surfaced over strategy and succession, and debates erupted about how quickly to fill the leadership vacuum. Some hardline clerics pushed to accelerate selection of a new leader, reflecting unease at temporary power-sharing arrangements during wartime. Tensions have been reported between IRGC-aligned hardliners and less hardline currents associated with the president, especially after controversial public comments about military operations.
The likely near-term outcome is therefore one of endurance coupled with contraction. The regime can remain standing, but it is apt to emerge more brittle and securitised: a greater reliance on the IRGC, reduced political space, heightened suspicion of dissent, and a tendency to treat opponents as existential threats. The reported preference for appointing Mojtaba Khamenei, the late leader’s son, illustrates a move toward consolidating loyalty and limiting uncertainty, even if that choice risks delegitimisation among broader constituencies.
War exposes weaknesses and reshuffles power. A regime that survives a decapitating strike often opts for survival tactics: inward turn, purges of perceived disloyal elements, and prioritising control over responsiveness. Such measures can prolong the regime’s life but erode its flexibility, economic performance and social legitimacy over time.
In short, the assassination did not automatically end the Islamic Republic because the system was designed to manage leadership shocks through constitutional provisions, institutional depth and, above all, the coercive capacity of the IRGC. But non-collapse is not reassurance. The state may persist in a harsher, more insecure form, paying a high cost in political openness and internal cohesion. That is the paradox now confronting Iran: survival by means that increasingly weaken the regime’s adaptability and long-term resilience.