Ali Hosseini Khamenei, Iran’s supreme leader since 1989 and a central architect of the Islamic Republic’s entrenched hard‑line, anti‑Western course, has been confirmed killed in a joint U.S.–Israeli strike on Tehran, aged 86.
Khamenei was only the second supreme leader in the forty-seven-year history of the Islamic Republic, succeeding Ayatollah Ruhollah Khomeini.
Khomeini was a tough act to follow, because he combined the status of founder and paramount religious authority with revolutionary charisma in a way no successor could ever match. Khamenei inherited a system built around Khomeini’s personal mystique but lacked the latter’s stature, forcing him to construct power through institutions. Without Khomeini’s legitimacy, Khamenei relied more on bureaucratic control and repression than on personal authority, helping to produce the Islamic Republic’s increasingly securitized, faction‑ridden politics.
Born in 1939 in the clerical city of Mashhad, Khamenei was drawn early into Islamist opposition to the Shah and into Khomeini’s orbit. He spent years under surveillance by SAVAK, the Shah’s secret police, facing arrests, interrogation and internal exile for preaching against the monarchy. After the 1979 revolution he emerged as a political fixer as a leading figure in the Islamic Republican Party, the leader of Tehran’s Friday prayer, and president from 1981 to 1989 during the Iran‑Iraq war. In that role he backed the harsh consolidation of the new order and aligned closely with the Revolutionary Guard.
When Khomeini died in 1989, the clerical Assembly of Experts, which is responsible for choosing Iran’s supreme leader, amended the constitution to lower the religious requirements for the post and elevated Khamenei despite his middling clerical rank. That left him reliant on revolutionary institutions, above all the Islamic Revolutionary Guard Corps (IRGC), but over time he turned the office into the unquestioned apex of Iran’s system. As supreme leader he commanded the armed forces, controlled the judiciary, state broadcasting, and intelligence, and dominated the vetting of candidates for major national elections through his control of the Guardian Council, which enabled him to shape every major election and policy line.
Abroad, his signature project was building what he called an “axis of resistance” linking Lebanese Hezbollah, Syrian and Iraqi militias, Yemeni Houthis and Palestinian factions. Under his watch the IRGC and its Quds Force became Iran’s main instruments of regional power, overseeing proxy warfare and ballistic‑missile development while also entrenching themselves in the domestic economy. He fused doctrinal hostility to the United States and Israel with a strategy that treated confrontation as both ideological duty and a form of leverage. On the nuclear issue he authorized a sweeping enrichment programme but insisted, through a fatwa فتوا, that nuclear weapons were forbidden. This dual track yielded the 2015 nuclear deal and, after Washington’s withdrawal, a renewed acceleration and tighter alignment with Russia and China.
At home, Khamenei presided over an increasingly securitized state that met protest with force. Student unrest in 1999, the Green Movement in 2009, economic and fuel‑price protests in 2017–18 and 2019, the women‑led “Woman, Life, Freedom” uprising in 2022-23, and the most recent unrest since the end of December 2025 were all ultimately crushed with live fire, mass arrests and executions. Human rights groups and exiled opposition movements hold him personally responsible for thousands of killings and systemic torture, from the 1980s prison massacres, when he was president, to the shootings and hangings that followed later demonstrations.
In his final years, reports of serious illness and cognitive decline fueled debate over succession, even as Israeli operations pushed deeper into Iran and closer to his own security bubble and the country was rocked by some of the largest protests in its history. Khamenei publicly cast these uprisings as products of U.S. and Israeli plots and demanded uncompromising repression. His death in a strike on Tehran that was part of a campaign that openly targeted Iran’s leadership closes the circle on that arc and leaves open whether the highly centralised system he engineered can now manage a transition without fracturing at the top or exploding from below.
Andres Ilves
Andres Ilves is Senior Director for Strategic Initiatives at MBN. His career as a journalist and writer includes two decades at the BBC and Radio Free Europe.
