Baghdad Manifesto

He then called an assembly of leading Sunni and Twelver Shi'a scholars, including several esteemed Alids. The assembly issued a manifesto denouncing the Fatimids' claims of descent from Ali and the Ahl al-Bayt (the family of Muhammad) as false, and thus challenge the foundation of the Fatimid dynasty's claims to leadership in the Islamic world.^[2][3]

Based on the work of the earlier anti-Fatimid polemicists Ibn Rizam and Akhu Muhsin, the manifesto instead put forth an alternative genealogy of descent from a certain Daysan ibn Sa'id.^[4] The document was ordered read in mosques throughout the Abbasid territories, and al-Qadir commissioned a number of theologians to compose further anti-Fatimid tracts.^[2] The manifesto and its list of signatories were reproduced by multiple medieval sources,^[5] and during the early 20th century, due to the lack of sources that were not made available until later decades, it was used as a principal source on the origins and early history of the Fatimids.^[3]

• Daftary, Farhad (2007). The Ismāʿı̄lı̄s: Their History and Doctrines (Second ed.). Cambridge: Cambridge University Press. ISBN 978-0-521-61636-2.
• Jiwa, Shainool (2018). "The Baghdad Manifesto (402/1011): A Re-examination of Fatimid-Abbasid Rivalry". In Daftary, Farhad; Jiwa, Shainool (eds.). The Fatimid Caliphate: Diversity of Traditions. London and New York: I.B.Tauris, in association with the Institute of Ismaili Studies. pp. 22–79. ISBN 978-1-78831-133-5.