of the Shi'ite clergy. According to Mortaza Motahhari, the majority of Iranians turned to Shi'a Islam from the Safavid period onwards. Of course, it cannot be denied that Iran's environment was more favorable to the flourishing of the Shi'a Islam as compared to all other parts of the Muslim world. Shi'a Islam did not penetrate any land to the extent that it gradually could in Iran. With the passage of time, Iranians' readiness to practise Shi'a Islam grew day by day. It was the Safavids who made Iran the spiritual bastion of Shi’ism against the onslaughts of shi'as' by orthodox Sunni Islam, and the repository of Persian cultural traditions and self-awareness of Iranianhood, acting as a bridge to modern Iran. According to Professor Roger Savory: Contemporary era: Challenges of modernity and rise of Islamism During the 20th century Iran underwent significant changes such as the 1906 Constitutional Revolution and the secularism of the Pahlavi dynasty. According to scholar Roy Mottahedeh, one significant change to Islam in Iran during the first half of the 20th century was that the class of ulema lost its informality that allowed it to include everyone from the highly trained jurist to the "shopkeeper who spent one afternoon a week memorizing and transmitting a few traditions." Laws by Reza Shah that requiring military service and dress in European-style clothes for Iranians, gave talebeh and mullahs exemptions, but only if they passed specific examinations proving their learnedness, thus excluding less educated clerics. In addition Islamic Madrasah schools became more like 'professional' schools, leaving broader education to secular government schools and sticking to Islamic learning. "Ptolemaic astronomy, Aveicennian medicines, and the algebra of Omar Kahayyam" was dispensed with. Deobandis Darul Uloom Deoband was established in 1866 in the Saharanpur district of Uttar Pradesh, India, as part of the anti-British movement. It gave rise to a traditional conservative Sunni movement known as the Deobandi movement. Students from various regions, including Sistan and Baluchestan in Iran, attended Deoband, which led to the spread of its founders ideas. This movement had a significant impact on some of the new generation of Iranian intellectuals in the late 19th and early 20th centuries. After entering Iran, the students of this school continued to expand this thinking and with the formation of missionary groups. These thoughts have been strengthened on one hand due to the cultural relationships between the Baloch tribes and on the