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

Mosaddegh nationalized Iran's oil industry in 1951, threatening Western control of the country's resources

Before nationalization, British companies controlled most of Iran's oil wealth, with little revenue returned to Iranians. Mosaddegh's decision made him a national hero at home but triggered a Western-led embargo and ultimately contributed to the coup that removed him from power.

Oil nationalization triggered the CIA‑backed 1953 coup in Iran

NPR's Four Days in August podcast recounts the four days of covert CIA‑UK operations in Iran that toppled Prime Minister Mossadegh in August 1953. Threats of Iranian oil nationalization were a major driver of the decision to facilitate regime change.

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.

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

Ayatollah Khomeini led the ideological opposition to the Shah from exile

Exiled in 1964 for opposing a law that granted diplomatic immunity to US military personnel in Iran, Khomeini built a large following by smuggling recorded sermons into Iran on cassette tapes. He aimed to replace the monarchy with an Islamic republic governed by religious law.

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.

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.

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.

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.

Persia was officially called Iran by the international community in 1935

At the request of Reza Shah, the international community began using "Iran"—the name Iranians had always called their country—replacing the Western term "Persia." The change reflected a broader push for national identity and modernization under the Pahlavi dynasty.

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.

Iran’s 1979 revolution sparked a second oil shock—and reconfigured global energy markets

Widespread strikes in Iran’s oil sector during the 1978-79 revolution slashed production and triggered panic buying, flooding oil markets with fear.

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.

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'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.

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.

Gorbachev’s reform efforts accelerated the Soviet Union’s collapse

In the 1980s, Mikhail Gorbachev introduced glasnost (openness) and perestroika (restructuring) to reform the USSR. Instead of saving the system, the policies exposed deep problems—fueling unrest and weakening central control.

CIA factbook on the Middle East

The CIA’s World Factbook provides a comprehensive overview of 19 Middle Eastern nations. A wide range of background information is provided for: Armenia, Azerbaijan, Bahrain, the Gaza Strip, Georgia, Iran, Iraq, Israel, Jordan, Kuwait, Lebanon,...

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

A British trade corporation toppled the Mughal Empire

This History Extra feature explains how the East India Company—armed with royal backing, taxation rights, and military force—expanded from a trading venture into a corporate power that overtook the Mughal Empire and laid the foundations of British colonial rule in India.

Bobby Fischer’s 1972 victory ended Soviet dominance of chess

In Reykjavik, American Bobby Fischer defeated Soviet champion Boris Spassky to claim the world title. The Cold War showdown drew global attention, breaking the USSR’s 24-year grip on the championship.

Learn how governments around the world restrict internet access for their citizens

Various countries around the world, including China, Russia, and Iran, control their local DNS infrastructure, allowing them to block access to online content by preventing the internet "phone book" from finding the IP addresses for specific URLs. Government-controlled internet service providers can also cut off access entirely or throttle specific traffic.

Britain's PM signaled the acceptance of African decolonization in 1960

This audio excerpt captures Harold Macmillan’s 1960 “Wind of Change” speech, in which he acknowledged rising African nationalism and declared that Britain would not resist decolonization—a pivotal moment signaling the Empire’s accelerating retreat from the continent.

Cillian Murphy won best actor for his portrayal of Robert Oppenheimer

Cillian Murphy won Best Actor for his portrayal of Robert Oppenheimer in "Oppenheimer". The major critical and commercial success brought the Manhattan Project into popular culture and sparked renewed public interest in the nuclear age.

Camus died in a car crash, which some believe was orchestrated by the KGB

Albert Camus died in 1960, at the age of 46, after his publisher's car crashed into a tree. Italian author Giovanni Catelli, however, alleges that what appeared to be an accident was actually an assassination by the Soviet spy agency as a way to silence the French writer's anti-Soviet beliefs.

Why did Britian's intelligence agency hire Mussolini?

This article explains how and why Benito Mussolini worked for MI5, the British intelligence agency. Before Mussolini ever rose to power as a fascist dictator, he was a journalist who was willing to advocate for Italy to join the allies in World War...

One of the most famous portraits ever taken is 'Afghan Girl' (1984) by Steve McCurry, yet the subject Sharbat Gula went much of her life without being identified or benefitting from the image's success.

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

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

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

The hormonal disorder PCOS was renamed PMOS in 2026, a move designed to improve care and research by shifting the focus to the hormonal causes of this condition that affects 1 in 8 women.

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

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

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.'

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

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.

Clever Hans was a 1900s horse that was believed to be able to solve math equations, tell time, and read and comprehend German, until a psychology student discovered how he got his answers.

Watch a 1934 short film starring jazz legend Cab Calloway, a major figure in the Harlem Renaissance's music scene

The distributor behind 'Rocky Horror' pulled the film from its scheduled national release, believing it would be a failure, though it eventually amassed a dedicated fanbase through midnight showings, a trend that continues over 50 years later.

See photos of Meteora, a mountainous site in central Greece, home to 14th-century monasteries perched atop soaring outcroppings.

The price of gas is a composite made up of several different factors, with the federal gas tax making up less than 20% of what drivers pay at the pump.

See how Ebola tore through Guinea, Sierra Leone, and Liberia in 2014-2016.

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

Volcanoes 'die' when their supply of magma runs out, if they are shifted away from their underlying magma reservoir, or if they get clogged by collapsing or their magma cooling back into rock.

Memecoins are a type of cryptocurrency—a form of digital currency with a wide variety of uses—created around popular 'memes,' or viral internet jokes.

Poison ivy is in the same family as mangoes, cashews, and pistachios—and they all produce oily urushiol in their raw, unprocessed state—but they are typically prepared in ways to avoid causing human discomfort.

Hotels in Cannes, the glamorous city on the French Riviera, hire hawks to ward off seagulls during the city's famous film festival.