The 1979 Revolution was the mass uprising that toppled the Shah's dictatorship in Iran and replaced it with a theocracy grounded in Islamic Sharia law, shifting the source of political authority from one ruler's secular power to religious legitimacy under Ayatollah Khomeini.
The 1979 Revolution (also called the Iranian Revolution) ended the Shah's dictatorial rule in Iran and established the Islamic Republic, a theocracy where political authority flows from religion. Millions of Iranians, frustrated with the Shah's repression and Westernization policies, rallied behind Ayatollah Khomeini, a religious leader whose personal magnetism gave him classic charismatic authority. When the Shah fled, Khomeini's movement built an entirely new regime around Islamic Sharia law, with a Supreme Leader at the top whose legitimacy comes from religious credentials, not elections.
For AP Comp Gov, the revolution matters less as a history event and more as a textbook case of how sources of power and authority can change. Before 1979, authority in Iran rested on one man's secular dictatorship backed by military force. After 1979, it rested on religion, codified in a new constitution. That's a complete regime change, not just a new government. Same country, totally different rules of the game.
This term lives in Topic 1.5 (Sources of and Changes in Power and Authority) in Unit 1, and it directly supports learning objective AP Comp Gov 1.5.A, which asks you to explain sources of power and authority in political systems. The CED's essential knowledge names the 1979 Revolution explicitly as the example of Iran's transition from dictatorial rule to a theocracy based on Islamic Sharia law. It sits alongside the Communist Party's control of China's military and the multiparty transitions in Nigeria and Mexico as the core set of examples for how regimes draw on different sources of power. If an exam question asks where authority comes from in Iran, the answer traces straight back to 1979.
Keep studying AP® Comparative Government Unit 1
Charismatic Authority (Unit 1)
The revolution is the AP exam's favorite example of charismatic authority in action. Khomeini didn't inherit power or win an election. People followed him because of who he was, and that personal devotion became the foundation of a whole new regime.
Islamic Sharia Law (Unit 1)
Sharia is what the revolution put in place of the Shah's rule. After 1979, religious law became the source of legitimacy for Iran's government, which is what makes the regime a theocracy rather than just another authoritarian state.
Constitution (Unit 1)
Revolutions destroy old rules, but regimes need new ones to survive. Iran's post-1979 constitution institutionalized the Supreme Leader and embedded religious authority into formal structures, which is how charismatic authority got converted into something more permanent.
Military Forces (Unit 1)
The CED pairs Iran's story with China's, where the Communist Party's control over the military keeps the regime stable. The contrast is the point. In China, power flows from party control of the gun; in post-1979 Iran, it flows from religion.
The 1979 Revolution shows up in multiple-choice questions about sources of power and authority, almost always testing whether you can identify what changed. Practice questions ask things like which source of power became dominant in Iran after 1979 (religion), what theoretical concept the transition represents (regime change), and what legitimacy Khomeini relied on to establish the new regime (charismatic authority backed by religious credentials). The trap answers usually offer the military, a political party, or popular elections. No released FRQ has used the term verbatim, but Iran is a course country, so the revolution is fair game in any FRQ asking you to explain or compare sources of legitimacy across course countries. The move the exam rewards is naming the before and after, so dictatorial rule before 1979 and theocratic rule based on Sharia law after.
A coup is a small group, usually military officers, seizing the government from the top. The 1979 Revolution was the opposite, a mass popular uprising from below that didn't just swap leaders but replaced the entire regime. Nigeria's history of military coups is the AP contrast case. A coup often keeps the regime's basic structure with new people in charge, while Iran's revolution rewrote the rules of the game entirely, trading secular dictatorship for theocracy.
The 1979 Revolution overthrew the Shah's dictatorship in Iran and established a theocracy based on Islamic Sharia law.
It is the CED's named example of a change in the source of power and authority, moving Iran from secular dictatorial rule to religious legitimacy.
Ayatollah Khomeini's leadership is the classic AP example of charismatic authority being used to found a new regime.
The revolution counts as a regime change, not just a change in government, because the fundamental rules and sources of legitimacy were replaced.
On the exam, contrast Iran's religion-based authority after 1979 with China's party control of the military and the multiparty transitions in Mexico and Nigeria.
It was the mass uprising that overthrew the Shah's dictatorship in Iran and created the Islamic Republic, a theocracy based on Islamic Sharia law. The CED uses it as the key example of how a regime's source of power and authority can change.
No. It was a popular revolution driven by mass protests across Iranian society, not a takeover by military officers. That distinction matters because the exam contrasts revolutions like Iran's with coup-driven transitions like Nigeria's periods of military rule.
No. It replaced one form of authoritarian rule with another. The Shah's secular dictatorship became a theocracy where the Supreme Leader holds ultimate authority based on religious legitimacy, even though Iran does hold elections for some offices.
All three are CED examples of changing sources of power, but they moved in different directions. Mexico and Nigeria transitioned toward multiparty systems, while Iran transitioned from dictatorship to theocracy, making religion the dominant source of authority.
Yes. It appears in the essential knowledge for learning objective AP Comp Gov 1.5.A in Unit 1, and multiple-choice questions regularly ask what source of power became dominant in Iran after 1979 or what kind of legitimacy Khomeini used to build the new regime.
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