Mazandarani was, along with
Mohammad Kazem Khorasani and Hossein Khalili, counted among those
Ulama who resisted the
Qajar dynasty. They were also known as "Ulama Thalathah of
Najaf" city. Abdullah was one of the primary figures in the constitutional movement. He played an important part in the constitutional movement, which included encouraging people to resist the Russian invasion and unfair contracts, and writing letters in support of the
Islamic
religion. Along with Mohammad Kazem Khorasani, Mazandarani protested against the policies and interference of the English government in the internal affairs of Iran. He supported the movement of Iranian people during constitutionalism and sent telegrams and letters to encourage them.
Akhund Khurasani,
Mirza Husayn Tehrani and Shaykh Abdullah Mazandarani, theorised a model of religious secularism in the absence of Imam, that still prevails in Shia seminaries. The period from the destruction of the first parliament under the orders of Mohammad Ali Shah on June 23, 1908, to the Shah's deposition on July 16, 1909, is called the Lesser Despotism in modern Iranian history. The Shah repeatedly delayed the elections under the guise of fighting sedition and defending Islam. Mohammad Ali Shah wrote letters to the sources of emulation in Najaf, seeking their support against the perceived conspiracies of Babis and other heretics. However, Akhund Khurasani, Mirza Tehrani and Mirza Abdullah Mazandarani responded by affirming the religious legitimacy of democracy and advised the Shah to work within the constitutional framework in improving the conditions of society and defending the country against colonial influence. == See also ==