Analysis of the Scientific Contribution of Iranian Dā'īs in Explaining the Legitimacy of the Fatimid Imams in Egypt

With the relocation of the Fatimid caliphate to Egypt during the Islamic Middle ages, Iranian agents who were active in da'wa (invitation) organization as the religious rank of Dā'ī al-Du'āt and Hojjat (proof), started to promote and propagate inside and outside of the territory. Through scientific contribution in distribution and consolidating Fatimid’s religious and political power, Iranian dā'īas such as Hamid al-din Kermani, Al-Mu’ayyad Fid-din Shirazi and Nāsir Khusru played a significant role against opponents. The present study analyzes and explains the scientific contribution of Iranian agents through a descriptive-analytical method. It seems that Iranian dā'īas had explained the legitimacy of Fatimid Imams and rejected the views of opponents through scientific debates, teaching and writing.