|Biographical detail : ||The son of Maymun al Qaddah who was an oculist (Qaddah).
Qaddah conceived of a scheme of a secret society, which used religion to destroy the Caliphate and give Abdullah or his descendants the throne. It was this scheme, which culminated in the rise of the Fatimid dynasty in Tunisia and Egypt.
Before his death, he found a zealous disciple in Hamdan Qaramat who was the founder of the Qaramation sect (called by the modern writers ‘Bolsheviks of Islam’). The Qaramations were able to found an independent state on the shore of Persian Gulf in 899.