Long ago, many people in Iran were unhappy. 

Long ago, many people in Iran were unhappy. 
Many people joined together to protest. They wanted a new way to lead.
A new group of leaders took over. They made Iran an Islamic republic. 
The old king had to leave his home. This was a very big change for everyone. The people felt a new start was coming.
For a long time, people in Iran felt unhappy with their leaders. 

In the 1960s, the Shah started new programs to change the country. These changes made many religious leaders angry. One leader was Ruhollah Khomeini. He was a cleric, or a religious teacher. He spoke out against the Shah and had to leave the country for a while.
By 1977, many people began to protest in the streets. Some groups wanted different types of government. In 1979, the Shah left Iran. Shortly after, Khomeini returned to Iran. Millions of people met him in the streets. 
The Iranian Revolution was a massive change in how Iran was ruled. In 1979, the people overthrew the Pahlavi dynasty to start a new government. This old system was a monarchy, where a king called the Shah held power. The revolution changed the country into the Islamic Republic of Iran. A religious leader named Ruhollah Khomeini became the new leader of the nation. This event was very important because it changed Iran's relationship with the rest of the world. 
Many things led to this big moment over many years. In 1953, a coup helped the Shah gain more control over the country. A coup is when a group takes over a government by force. This event made the United States have more influence in Iran. Later, in 1963, the Shah started the White Revolution to modernize the land. These changes made many religious groups feel left out or unhappy. Because of this, Ruhollah Khomeini became a loud critic of the Shah. 
Protests grew larger and more intense as time went on. In October 1977, people began to hold large demonstrations in the streets. Different groups joined together, including socialists and religious people. In August 1978, a very sad fire happened at the Cinema Rex. About 400 people died in that fire. Many people believed the Shah's secret police caused it to stop the protests. This caused even more anger and made the protests spread everywhere. 
By the start of 1979, the government was starting to fail. On January 16, 1979, the Shah left Iran to live in exile. He left his duties to a council and a prime minister named Shapour Bakhtiar. Then, on February 1, 1979, Khomeini returned to the city of Tehran. Millions of people were in the streets to greet him. By February 11, the monarchy was officially over. Khomeini took charge as the new leader of the country.
After the revolution, Iran became a very different place. In March 1979, a vote called a referendum was held. About 98% of the people voted to become an Islamic republic. This led to a new constitution for the nation. Khomeini became the supreme leader in December 1979. The new government wanted to focus more on Islamic ideas. This changed how Iran interacted with other countries for a long time.
The Iranian Revolution, also known as the Islamic Revolution, was a massive political transformation. In 1979, it replaced the Pahlavi dynasty with the Islamic Republic of Iran. This event ended Iran's long history of monarchy. The monarchical government of Shah Mohammad Reza Pahlavi was superseded by Ruhollah Khomeini. Khomeini was an Islamist cleric who led one of the rebel factions. This revolution changed Iran's relationship with the world. It shifted the nation from a pro-Western secular monarchy to an anti-Western Islamic republic. 
The revolution was driven by many deep-seated tensions. Many Iranians felt the Shah's regime was corrupt and repressive. People believed the government was too reliant on foreign powers. Specifically, many felt the United States and United Kingdom had too much influence. This perceived loss of sovereignty hurt Iran's cultural identity. Economic issues also played a major role. While there was relative prosperity, there were also economic bottlenecks and inflation. An ambitious economic program and a sudden contraction in 1977–1978 caused widespread anger. 
History shows that resistance to foreign influence and monarchy existed long before 1979. In 1891, the Tobacco Protest saw the Shi'a clergy influence society. This happened after the Shah granted a tobacco monopoly to a British major. This monopoly threatened the livelihoods of 200,000 people. Later, the Constitutional Revolution of 1905–1911 established a parliament called the Majlis. In 1921, General Reza Khan seized power in a coup. He founded the Pahlavi dynasty as Reza Shah. His secular reforms, such as banning traditional Islamic clothing, caused significant public discontent.
A critical turning point occurred in 1953. In that year, a coup d'état backed by the CIA and MI6 took place. This coup overthrew Prime Minister Mohammad Mossadegh. Mossadegh had nationalized the Anglo-Iranian Oil Company to reclaim petroleum reserves. The coup reinstated Mohammad Reza Pahlavi as an absolute monarch. This event significantly increased United States influence over Iran. In 1963, the Shah launched the White Revolution. This was a modernization and land reform program. However, it alienated many people, especially the clergy. 
The movement grew through several intense stages of protest. In October 1977, anti-government demonstrations began to spread. These protests involved communists, socialists, and Islamists. A major turning point happened in August 1978. A fire at the Cinema Rex killed approximately 400 people. Many citizens believed the Shah's secret police, SAVAK, caused the fire. They thought it was a false flag operation to justify a crackdown. This belief fueled nationwide outrage and mobilization. By the end of 1978, the uprising had paralyzed the entire country. 
The final collapse of the monarchy happened very quickly in early 1979. On January 16, 1979, Shah Mohammad Reza Pahlavi left Iran for exile. He left his duties to a Regency Council and Prime Minister Shapour Bakhtiar. On February 1, 1979, Ruhollah Khomeini returned to Tehran. Several million people greeted him upon his arrival. By February 11, the monarchy was officially overthrown. Rebel troops and guerrillas overwhelmed the Pahlavi loyalists in combat.
Following the takeover, the new government established a new system. In March 1979, a referendum was held to decide the nation's future. About 98% of the voters approved the shift to an Islamic republic. This led to the drafting of a new constitution. In December 1979, Khomeini became the supreme leader. The new government was based on the concept of Guardianship of the Islamic Jurist. This system sits between authoritarianism and totalitarianism. 
The revolution had lasting effects on regional politics. Post-revolutionary Iran aimed to support Shi'ite political ascendancy. It sought to undermine the influence of Sunni leaders in the region. The new government also declared the destruction of Israel as a core objective. This caused a massive exile of people, creating a large Iranian diaspora. The revolution remains a profound example of how religious and nationalist goals can merge to change a nation's entire structure.
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