Abū al-Ḥusayn Aḥmad b. Yaḥyā Ibn al-Rāwandī(815–860 or 910), perhaps one of the most controversial figures in early Islamic history, is frequently called the “arch-heretic” (zindīq or mulḥid) of Islam. He was born in Khurasan around 815 CE. but flourished among intellectuals in ninth century in Baghdad. Around the year 854, he left Baghdad to escape political persecution and died either in 860 or in 910, according to some sources. The details of his early life are unknown, and documentation (...) of Ibn al-Rāwandī began to surface once he became an intellectual enemy of his fellow Muʿtazilites, the rationalist thinkers of Islamic thought at the time. Information on Ibn al-Rāwandī is gathered mostly from the writings of his opponents. From these sources, we learn that both Muslims and non-Muslims (especially Jews) wrote polemics against Ibn al-Rāwandī in which they acknowledged the serious threat his work posed not only to Islam, but also to Judaism and all Abrahamic religions. (shrink)