Ayatollah Khomeini led the ideological opposition to the Shah from exile

Ayatollah Khomeini returned to Iran on Feb. 1, 1979, after 14 years in exile

Greeted by millions of Iranians flooding the streets of Tehran, Khomeini's return was a defining moment of the revolution. Within days, he appointed a rival prime minister, effectively dismantling the last remnants of the Shah's government and consolidating clerical rule over the new Islamic Republic.

See a timeline of the events that shaped the Iranian Revolution

From a defamatory newspaper editorial that sparked protests in January 1978 to Khomeini's return from exile and the Shah's flight from Iran in 1979, this timeline traces the rapidly escalating chain of events—protests, crackdowns, and political collapses—that toppled one of the Middle East's most powerful monarchies.

Watch contemporary footage covering the US-backed Shah of Iran fleeing the country in the face of the 1979 Iranian Revolution

Mohammad Reza Shah Pahlavi ruled Iran for nearly four decades before being ousted by the revolution

The last Shah of Iran came to power in 1941 and pursued rapid Westernization through his controversial reforms. His authoritarian rule, backed by the US, and his feared secret police, SAVAK, fueled mass resentment that ultimately drove him from power in 1979.

The Shah fled Iran in January 1979, ending nearly 38 years of Pahlavi rule

On Jan. 16, 1979, Mohammad Reza Shah left Iran with his wife, officially for a "vacation"—one he would never return from. His departure marked the effective collapse of the monarchy, as millions celebrated in the streets and power swiftly shifted to Khomeini's revolutionary movement.

Iranians voted overwhelmingly to establish an Islamic Republic in March 1979

Just weeks after Khomeini's return, Iran held a national referendum to replace the monarchy with an Islamic Republic, and over 98% voted in favor (though the vote was criticized). The vote formalized the revolution's outcome, laying the foundation for a theocratic government that remains in place today.

Ayatollah Khamenei ruled Iran for 36 years after succeeding Khomeini as Supreme Leader

When Khomeini died in 1989, Ali Khamenei was appointed acting supreme leader on the same day. He served in this position until his death in February 2026, shaping Iran for nearly four decades.

Mohammad Mosaddegh was ousted in a CIA-backed coup in 1953

Iran's democratically elected prime minister, Mosaddegh, nationalized the country's oil industry in 1951, challenging British and American control of Iran's resources. The CIA and British intelligence orchestrated a coup that ousted him and reinstated the Shah, fueling decades of Iranian distrust of the West.

The Shah used torture and other human rights abuses to maintain power before the revolution

A declassified 1976 US Embassy telegram acknowledged that the Shah held 3,400-3,500 political prisoners, documented torture allegations against the SAVAK secret police, and confirmed press censorship, even as American diplomats sought to minimize human rights concerns for Congress.

'Velayat-e faqih' is the religious doctrine that has governed Iran since the 1979 revolution

Meaning "guardianship of the Islamic jurist," the doctrine transfers all political and religious authority to the Shia clergy, with the supreme leader holding ultimate power over the state. Developed by Khomeini in the 1970s, it has served as the foundation of Iran's government since the revolution.

The 1979 Iranian Revolution inspired other Islamist movements and alarmed Sunni governments

By establishing the world's first modern Islamic theocracy, the revolution inspired Islamist movements across the region and alarmed Sunni Arab governments. The resulting rivalry between Shia Iran and Sunni Saudi Arabia has since fueled proxy conflicts in Lebanon, Iraq, Syria, and Yemen that persist today.

The Iranian Revolution relied largely on nonviolent tactics

Despite thousands of unarmed protesters killed by the Shah's forces, the revolution relied overwhelmingly on nonviolent tactics, including strikes, demonstrations, and civil disobedience, with up to 9 million Iranians peacefully taking to the streets, making it one of history's largest protest movements by population percentage.

Iran became a constitutional monarchy in 1906

A popular revolution forced the ruling Qajar Shah—a dynasty that had governed Iran since the late 18th century—to sign a constitution and establish a parliament, marking Iran's first major step toward democratic governance and limiting the monarchy's absolute power.

Iraq invaded Iran in 1980, drawing the new Islamic Republic into a devastating eight-year war

Just a year after the revolution, Saddam Hussein invaded Iran, hoping to exploit its post-revolutionary instability. The brutal conflict killed hundreds of thousands in one of the century's deadliest conflicts and forced Khomeini's government to consolidate power.

In 1979, Iranian students seized the US Embassy in Tehran, holding 52 Americans hostage for 444 days

Outraged by the US decision to allow the exiled Shah to enter the United States for medical treatment, student protesters stormed the embassy in November 1979. The crisis paralyzed the Carter presidency and ended with a negotiated release on the day of Ronald Reagan's inauguration.

The UN found that the Islamic Republic of Iran used genocidal tactics after the revolution

A 2024 report classified Iran's mass executions of political prisoners in the 1980s as genocide and crimes against humanity, finding that thousands were arbitrarily killed under Khomeini's orders by "death committees" targeting perceived religious and political enemies.

Iran's Revolutionary Guard Corps is independent of Iran's regular army and is one of the most powerful and influential military-political organizations in the Middle East.

Salman Rushdie's 1988 satire led to a government-sponsored death threat

Rushdie's novel "The Satanic Verses" mocked religious dogma, including an extended sequence about the Prophet Muhammad. The book was accused of blasphemy and was banned in Pakistan and India. In 1989, Iran's Ayatollah Ruhollah Khomeini issued a fatwa calling for the death of Rushdie and his publisher.

A podcast dramatization of the schism that split Islam into Sunni and Shia

The events following Muhammad's death were a bitter succession dispute that divided Islam into its two major branches. You can relive them in this dramatic narrative from the Conflicted History podcast, which provides an immersive entry point into the issue.

The US tried to overthrow the communist government in Cuba—and failed

In 1961, the US backed an invasion of Cuba by anti-Castro exiles, aiming to spark an uprising against the communist government. The operation collapsed within days, embarrassing the US and pushing Cuba closer to the Soviet Union.

US intelligence allegedly pursued more than 600 schemes to assassinate Cuban revolutionary Fidel Castro.

Dr. Martin Luther King Jr. publicly denounced the Vietnam War in 1967

In a 1967 speech, Dr. King comprehensively condemned the US war in Vietnam, linking militarism, racism, and poverty—a break that cost him allies and drew backlash from political leaders and major media outlets.

Shays' rebellion pitted rebel veterans against the Revolution's leaders

The Revolutionary War led to independence and significant debt for most states. In 1786, a group of veterans and farmers from western Massachusetts protested against the state government’s increased taxes. Led by Daniel Shays, the group attempted to capture an armory in Springfield but failed.

Garry Kasparov, former world chess champion, is a critic of authoritarian regimes

World champion from 1985 to 2000, Kasparov was politically outspoken during the Soviet era, clashing with authorities over censorship and restrictions. After retirement, he became a leading Russian dissident and fierce critic of Vladimir Putin, eventually fleeing the country in 2013.

Retracing the 1960s history of dropping out

A core element of the 1960s counterculture was the idea of dropping out of school and the broader technocratic institutions at the time. This push coincided with paranoia over mind control during the Cold War, and as some rogue psychologists advocated for the liberating use of psychedelics.

Watch Johnny Cash’s 1969 concert at San Quentin

Johnny Cash is one of the most recognizable names in country music, but by the 1960s, he was also a rock icon. Part of that status was due to his outlaw identity and willingness to play for true outsiders. This documentary from one of his most famous performances shows why.

'The Republic of Letters' was an analog internet for the Enlightenment.

The virtual intellectual society exchanged tens of thousands of letters and spanned several continents. Some of its most avid correspondents were Voltaire, Benjamin Franklin, and Saint Ignatius of Loyola, founder of the Jesuits.

Alexander Hamilton argued in Federalist 69 that the president's military authority was far more limited than a king's

Hamilton wrote that the president's commander-in-chief role amounted to little more than the authority to command the military, while the powers to declare war, raise armies, and regulate fleets belonged to the legislature. He contrasted this with the British king to argue that the executive posed no threat of tyranny.

The rivalry between Alexander Hamilton and Thomas Jefferson centered on federalism—the question of how much power the federal government should hold relative to the states.

The identity of the Tank Man in the iconic photo from the 1989 Tiananmen Square protests remains unknown and was possibly killed.

Famed poet TS Eliot rejected the manuscript for George Orwell's political fable 'Animal Farm,' writing that its criticism of authoritarianism was not 'the right point of view.'

Take a 3D tour of the Hajj, Islam's annual pilgrimage to Mecca, undertaken by over 1.5 million Muslims.

Jimmy Carter signed a 1978 bill that legalized home brewing, a move credited with kick-starting the craft beer industry.

Sunflowers have long been a symbol of nuclear disarmament because they can extract large amounts of radioactive cesium from soil.

The US Constitution is widely regarded as the longest-standing written national constitution still in force—see how it has influenced rights worldwide.

After the Boston Tea Party, colonists switched to coffee, which became the main morning drink for revolutionaries.

In 2018, 26-year-old missionary John Allen Chau was killed by tribesmen after attempting to reach and evangelize on India's isolated North Sentinel Island

'Shogun,' a 1980s TV series, helped popularize sushi in the US by stimulating an American interest in Japanese culture.

A researcher recently discovered an interview from 1967 between groundbreaking journalist Joan Didion and the Grateful Dead, years before the band became an institution.

During the French Revolution, a botanist's letter asking about "dear Rhus" (poison ivy) was intercepted, leading authorities to suspect he was conspiring with the Russians.

The term 'algorithm' originated from the Latinized name of al-Khwārizmī, a 9th-century mathematician whose works introduced Arabic numerals and the decimal-based numeral system to Europe and whose treatise 'Al-Jabr' gave algebra its name.

In preparation for this weekend's Eurovision finale, which is something like the World Cup of pop music, here's a young Céline Dion performing (for Switzerland?) at the 1988 competition.

The story of Dollree Mapp, whose legal challenge over her 1957 conviction for possessing "obscene material" led to a major strengthening of the Fourth Amendment

The name 'Silicon Valley' arose from the founding of Shockley Semiconductor Laboratory in Fairchild Semiconductor in 1956-57, founded near Stanford University in Palo Alto

Prince's sexually explicit 1984 track 'Darling Nikki' attracted the ire of the Parents Music Resource Center, an advocacy group that inspired the Parental Advisory sticker, even though the song ends with a Christian message.

An initial public offering or 'IPO' is the process of a private company becoming public by putting shares of the company on the stock market for purchase.

Before humans, the Soviet Union and the United States sent animals—including apes, dogs, and cats—to space during the Space Race.

The first horror movie is believed to be George Méliès' 1986 short 'The Haunted Castle,' which pioneered the use of special effects

The boiling temperature of water decreases with increasing elevation because the molecules need less energy to overcome the lower atmospheric pressure associated with thinner air.