RT Article T1 The Parting of Ways between ʿAlid Shiʿism and Abbasid Shiʿism: An Analysis of the Missives between the Caliph al-Manṣūr and Muḥammad al-Nafs al-Zakiyya JF Journal of Abbasid Studies VO 6 IS 2 SP 209 OP 227 A1 Tor, Deborah G. LA English YR 2019 UL https://ixtheo.de/Record/1698659318 AB The Abbasid Revolution rode to power on a religious ideology based upon ʿAlī’s legitimacy and the Abbasid Muḥammad b. ʿAlī’s supposed appointment as imam by ʿAlī’s grandson Abū Hāshim. In the wake of the Revolution, however, the differences between the Hāshimiyya and purely ʿAlid branches of the proto-Shiʿa came to a head. This article demonstrates that the pivotal theological turning point occurred in the year 145/762, as a result of the revolt of the Ḥasanid Muḥammad al-Nafs al-Zakiyya. The article’s close reading of the arguments adduced in the purported correspondence between the two sides, preserved uniquely in al-Ṭabarī’s chronicle, reveals why in the wake of this revolt the Abbasids ultimately found the legitimating theology of their original daʿwa to be untenable. K1 Abbasid Caliphate K1 Hāshimiyya K1 Muḥammad al-Nafs al-Zakiyya K1 Shiʿism K1 ahl al-ḥadīth K1 al-Manṣūr DO 10.1163/22142371-12340049