18.4 Iranian Revolution
(1978–1979)

For many centuries, Iran was governed by successive dynasties, including the Qajar dynasty (1794–1925) and the Pahlavi dynasty (1925–1979). The ruler used the title shah, meaning king.

By the 20th century, many Iranians saw the shah’s rule as authoritarian, too closely tied to foreign powers, and too aggressive in pushing top-down modernization. These tensions built over time and contributed to the revolution that overthrew the monarchy in 1979.

The Iranian Revolution (1978–1979) did not begin as a purely Islamic movement. It began as a broad coalition against the shah that included Islamists, secular liberals, Marxists, student groups, and other opponents of the regime. However, after the shah was overthrown, Ayatollah Ruhollah Khomeini and his supporters gradually outmaneuvered, suppressed, or purged many of the secular and leftist factions, consolidating power into an Islamic theocracy.

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Several earlier events helped set the stage for this revolution.

One major turning point was the 1953 coup, in which the U.S. and U.K. overthrew Iran’s Prime Minister Mohammad Mossadegh after he had moved to nationalize Iran’s oil industry. The coup restored the shah’s power and deepened Iranian resentment toward the United States and Britain, which were widely seen as interfering in Iran’s political future.

Another major source of unrest was the White Revolution, a series of reforms launched by the shah in the 1960s. These reforms included land redistribution, expanded education, and greater rights for women. While some viewed these changes as modernization, others saw them as forced Westernization, an attack on traditional religious authority, and an expansion of state power. Khomeini became one of the most outspoken critics of these reforms.

After the revolution, Iran was transformed into an Islamic Republic under Khomeini’s leadership. A key idea behind the new system was “Guardianship of the Jurist” (Velayat-e Faqih), the doctrine that a leading Islamic jurist should rule the state and guide society according to Islamic law. This principle gave religious leadership direct political authority and became one of the foundations of Iran’s new regime.

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This was a Shiite Islamic revolution, not a Sunni jihadist movement like Al-Qaeda or ISIS. However, it is still important in the history of Islamist extremism because it showed that a religious movement could overthrow a modern state and establish a government based on its interpretation of Islam.

The revolution also intensified hostility toward the United States and other Western powers. Many Iranians believed the U.S. had helped keep the shah in power and had supported repression, corruption, and foreign influence in Iran. During this period, anti-American slogans such as “Death to America” became part of the revolutionary culture.

That hostility became especially visible during the U.S. embassy hostage crisis (1979–1981), when Iranian student revolutionaries seized the American embassy in Tehran and held 52 Americans hostage for 444 days. The crisis became one of the most recognizable symbols of the new regime’s anti-American identity.

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The Iranian Revolution also helped expand Islamist militancy beyond Iran’s borders. In the early 1980s, Iran supported the development of Hezbollah in Lebanon, a Shiite Islamist organization that combined armed struggle with political and social power. We will examine Hezbollah later in this module.

The Iranian Revolution did not directly create Sunni extremist groups such as Al-Qaeda, Boko Haram, Al-Shabaab, or ISIS, which emerged from different sectarian and historical backgrounds. Still, it was a major turning point because it demonstrated that militant religious rule could seize state power, resist Western influence, and inspire later Islamist movements in other contexts.

In section 18.5, we will examine the Soviet–Afghan War (1979–1989), which played a major role in the rise of Sunni jihadist networks and later groups such as Al-Qaeda.