Reza Shah  Reza Shah Pahlavi (; ; 15 March 1878 – 26 July 1944), commonly known as Reza Shah, was the Shah of Iran from 15 December 1925 until he was forced to abdicate by the Anglo-Soviet invasion of Iran on 16 September 1941. Two years after the 1921 Persian coup d'état, led by Zia ol Din Tabatabaee, Reza Pahlavi became Iran's prime minister. The appointment was backed by the compliant national assembly of Iran. In 1925, Reza Pahlavi was appointed as the legal monarch of Iran by decision of Iran's constituent assembly. The assembly deposed Ahmad Shah Qajar, the last Shah of the Qajar dynasty, and amended Iran’s 1906 constitution to allow selection of Reza Pahlavi. He founded the Pahlavi dynasty that lasted until overthrown in 1979 during the Iranian Revolution. Reza Shah introduced many social, economic, and political reforms during his reign, ultimately laying the foundation of the modern Iranian state. His legacy remains controversial to this day. His defenders assert that he was an essential modernizing force for Iran (whose international prominence had sharply declined during Qajar rule), while his detractors assert that his reign was often despotic, with his failure to modernize Iran's large peasant population eventually sowing the seeds for the Iranian Revolution nearly four decades later, which ended 2,500 years of Persian monarchy. Moreover, his insistence on ethnic nationalism and cultural unitarism, along with forced detribalization and sedentarization, resulted in the suppression of several ethnic and social groups. Although he himself was of Mazandarani descent, his government carried out an extensive policy of Persianization trying to create a single, united and largely homogeneous nation, similar to Mustafa Kemal Atatürk's policy of Turkification. Reza Shah Pahlavi was born in the village of Alasht in Savadkuh County, Mazandaran Province, in 1878, to Major Abbas-Ali Khan and Noush-Afarin. His mother was a Muslim immigrant from Georgia (then part of the Russian Empire), whose family had emigrated to Qajar Iran when it was forced to cede all of its territories in the Caucasus following the Russo-Persian Wars several decades prior to Reza Shah's birth. His father was a Mazandarani, commissioned in the 7th Savadkuh Regiment, and served in the Anglo-Persian War in 1856.