Mohammad Reza Shah Pahlavi was the Shah of Iran. In 1941, he succeeded his father Reza Shah and ruled the Imperial State of Iran until 1979 when the Iranian Revolution overthrew him, abolished the monarchy, and established the Islamic Republic of Iran. In 1967, he took the title Shahanshah, and also held several others, including Aryamehr and Bozorg Arteshtaran. He was the second and last ruling monarch of the Pahlavi dynasty. His vision of the "Great Civilization" led to his leadership over rapid industrial and military modernization, as well as economic and social reforms in Iran.