In Iran, after the ousting of Reza Shah in 1941 and the Anglo-Soviet occupation of Iran, nationalist movements among Kurds gained strength and Sorani became the formal language again, especially in Mukriyan where the "Komeley Jiyanewey Kurd" (KJK) used Sorani as their official language. Sorani was also introduced in schools, administration and in mosques. Kurds in Iraq aided with this, for example by exporting school books to Iran. Language planning was also in the works but rudimentary. When the Republic of Mahabad fell, formal use of Sorani also ceased in Iran, however the new Pahlavi state under Mohammad Reza Pahlavi would become more tolerant than that of Reza Shah. Researcher Hassanpour argues that the reason for this was the vulnerability of the new central government which had to approach the Kurds more relaxed. For this, some developments did take place including the publication of periodicals in Sorani but also state-sponsoed radio broadcasting and teaching Kurdish at the University of Tehran.