Pahlavi Iran

The Imperial State of Iran, known in the Western world as the Imperial State of Persia until 1935 and commonly referred to as Pahlavi Iran, was the Iranian state under the rule of the Pahlavi dynasty. It existed from the establishment of the dynasty in 1925 until its overthrow during the Iranian Revolution in 1979, which ended Iran's over 2,500-year-old monarchy.

In February 1921, Reza Khan, a brigadier general in the Persian Cossack Brigade, led a coup d'état against the ruling Qajar government, becoming the commander-in-chief of the country's armed forces. On 12 December 1925, Iran's Majles, convened as a constituent assembly, deposed the Qajar dynasty and proclaimed Reza Khan, then serving as prime minister, shah, thereby establishing the Pahlavi dynasty. Under his rule, Iran became a centralized unitary state and underwent a series of modernization reforms, including infrastructure development, the expansion of education, and the secularization of state institutions. In 1935, Reza Shah requested that foreign governments refer to the country as "Iran" rather than "Persia" in official correspondence. Although Iran declared neutrality during World War II, it was invaded and occupied by British and Soviet forces in 1941, forcing Reza Shah to abdicate in favor of his son, Mohammad Reza Pahlavi.

Following World War II, Mohammad Reza Pahlavi faced the Iran crisis of 1946, which ended with the withdrawal of Soviet forces from Iranian territory. A constitutional amendment in 1949 granted the Shah the authority to dissolve the Majles and call new elections, strengthening the monarchy amid growing political instability. The rise of Prime Minister Mohammad Mosaddegh and the nationalization of the Iranian oil industry culminated in a constitutional crisis that forced the Shah into temporary exile in 1953. Following Mosaddegh's overthrow in the 1953 Iranian coup d'état, however, the Shah returned to Iran and further consolidated his rule. Supported by rising oil revenues and Western backing during the Cold War, he pursued an extensive military buildup and launched the White Revolution, a broad reform program that implemented sweeping land reform while expanding state investment in education, healthcare, infrastructure, and industrial development. Throughout the 1960s and 1970s, Iran experienced rapid economic growth, rising living standards, and extensive infrastructure development, thereby emerging as a major regional power.

Despite these gains, economic development remained uneven, with persistent wealth inequality and widening rural-to-urban disparities. Following a sharp decline in oil revenues in 1977, Iran's economy entered a period of slowdown characterized by rising inflation, unemployment, and declining investment. The economic downturn, combined with longstanding grievances over political repression, fueled mounting unrest that culminated in the Iranian Revolution, led by the exiled Shia cleric Ruhollah Khomeini. Following months of nationwide protests and strikes, the Shah and his family left Iran in January 1979, leading to the collapse of the imperial state and the establishment of an Islamic Republic.