Background and causes of the Iranian Revolution
| History of the Iranian Revolution | 
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The Iranian revolution was the Shia Islamic revolution that replaced the secular monarchy of Shah Mohammad Reza Pahlavi with a theocratic Islamic Republic led by Ayatollah Ruhollah Khomeini.
Its causes continue to be the subject of historical debate and are believed to have stemmed partly from a conservative backlash opposing the westernization and secularization efforts of the Western-backed Shah, as well as from a more popular reaction to social injustice and other shortcomings of the ancien régime.