Imam/Ayatollah Ruhollah Musavi Khomeini (May 17, 1900 – June 3, 1989) was a Shiite Muslim cleric and marja, and the political leader of the 1979 Islamic Revolution of Iran which saw the overthrow of Mohammad Reza Pahlavi, the last Shah of Iran. Following the Revolution, Imam Khomeini became Supreme Leader of Iran —the paramount figure in the political system of the new Islamic Republic —until his death.
Imam Khomeini was considered a marja-e taqlid to many Shi'a Muslims, and in Iran was officially addressed as Imam rather than Grand Ayatollah; his supporters adhere to this convention. Imam Khomeini was also a highly-influential and innovative Islamic political theorist, most noted for his development of the theory of velayat-e faqih, the "guardianship of the jurisconsult". He was named Time's Man of the Year in 1979.