Then there were successive dynasties in Iran – the Afsharid dynasty (1736–1796 AD) (which mixed Shi'a and Sunni), Zand dynasty (1750–1794 AD) (which was Twelver Shia Islam), the Qajar dynasty (1794–1925 AD) (again Twelver). There was a brief Iranian Constitutional Revolution in 1905–11 in which the progressive religious and liberal forces rebelled against theocratic rulers in government who were also associated with European colonialization and their interests in the new Anglo-Persian Oil Company.The secularist efforts ultimately succeeded in the Pahlavi dynasty (1925–1979 AD). The 1953 Iranian coup d'état was orchestrated by Western powers which created a backlash against Western powers in Iran, and was among the background and causes of the Iranian Revolution to the creation of the Islamic republic.