How Ali Khamenei Became Iran's Supreme Leader in 1989: The Full Story

On 4 June 1989, hours after Ayatollah Ruhollah Khomeini died, Iran's Assembly of Experts convened an emergency session and elected Ali Khamenei as the Islamic Republic's second Supreme Leader. The choice was surprising: Khamenei held only the rank of Hojatoleslam, a mid-tier clerical title, not the Grand Ayatollah status the constitution had seemed to require. To make the succession legally possible, Iran simultaneously ratified sweeping constitutional amendments that removed the religious-rank requirement — a pivotal moment that redefined who could hold the country's highest office.

Why Was the 1989 Succession Such a Constitutional Crisis?

Iran's 1979 constitution stipulated that the Supreme Leader must be a Marja — a Grand Ayatollah with a large clerical following. Khamenei, who had served as President since 1981, did not qualify. The designated successor, Grand Ayatollah Hossein-Ali Montazeri, had been Khomeini's own chosen heir, but Khomeini publicly dismissed him in March 1989 after Montazeri criticised the mass executions of political prisoners. With Khomeini gravely ill and no qualified replacement ready, the regime faced an existential legitimacy gap. The solution was a constitutional referendum held on 28 July 1989, which removed the Marja requirement and centralised power, allowing a politically loyal but clerically junior figure to lead the state.

How Did the Assembly of Experts Choose Khamenei?

The 83-member Assembly of Experts met on 4 June 1989, the same day Khomeini was pronounced dead. Key power brokers, including Akbar Hashemi Rafsanjani, the influential Parliament speaker, championed Khamenei as a safe, ideologically reliable candidate who could hold the revolutionary system together. Rafsanjani later revealed that Khomeini had privately endorsed Khamenei in his final weeks. The assembly voted overwhelmingly in Khamenei's favour. Within days, Khamenei was elevated — somewhat controversially — to the rank of Ayatollah by sympathetic clerics, a promotion widely seen as politically engineered rather than earned through traditional religious scholarship.

What Was the Lasting Impact of the 1989 Supreme Leader Election?

The 1989 succession fundamentally altered the Islamic Republic's character. By decoupling supreme religious authority from supreme political authority, the new constitutional framework prioritised political loyalty over clerical stature. Khamenei, who was just 49 at the time, went on to consolidate extraordinary power over the military, judiciary, media, and nuclear policy. Montazeri, sidelined and later placed under house arrest from 1997 to 2003, became a symbol of internal dissent. The 1989 election set a precedent that the Supreme Leader is, above all, a political office — a legacy that continues to shape every major crisis in Iran, from the 2009 Green Movement to the 2022 Mahsa Amini protests.