Overview
The system pairs elected institutions with clerical authority: a president and parliament chosen by vote operate under an unelected Supreme Leader and clerical review bodies. This hybrid, established after the revolution overthrew the Pahlavi monarchy in 1979, has framed Iranian politics from the founding to the present.
Key developments
The founding decade was dominated by the hostage crisis of 1979–81 and the Iran–Iraq War of 1980–88, alongside post-revolutionary purges and the 1988 prisoner executions, which rights organizations have documented with estimates in the thousands. Khomeini died in 1989 and Khamenei succeeded him as Supreme Leader; the constitution was revised the same year, strengthening the presidency and abolishing the premiership. Reconstruction under the pragmatist Rafsanjani (1989–97) gave way to the reformist Khatami (1997–2005), whose civil-society opening met conservative pushback. Under the populist Ahmadinejad (2005–13), the disputed 2009 re-election set off the Green Movement protests, suppressed with deaths and mass arrests whose figures vary. The centrist Rouhani (2013–21) concluded the JCPOA nuclear deal in 2015, followed by the US withdrawal of 2018 and renewed sanctions; the hardliner Raisi (2021–24) died in a helicopter crash in 2024 and was followed by Pezeshkian (2024–).
End and transition
The period is ongoing, with standing features that include the nuclear standoff and cycles of sanctions, and a regional network of allied militias with involvement in Syria, Iraq, Lebanon, and Yemen. Mass protests have recurred — the student protests of July 1999 after the raid on a Tehran University dormitory, in 2009, in 2017–18, in 2019 over fuel prices (when, per rights groups, hundreds were killed), and in 2022–23 after Mahsa Amini’s death in morality-police custody, met with crackdowns whose lethal toll rights organizations have documented. Society combines high urbanization and education, including women’s majorities at universities, with legal restrictions on women and dissent, and a large diaspora lives abroad. Assessments of the era as a whole remain deeply contested, inside Iran and beyond.