MUTAZILA
Like all other schools, Mu'tazilism developed over an extensive period of time. Abu al-Hudhayl al-'Allaf (d. 235 AH/849 AD), who came a couple of generations after Wasil ibn 'Ata' and 'Amr ibn 'Ubayd, is considered the theologian who systematized and formalized Mu'tazilism in Basra (Martin et al., 1997). Another branch of the school found a home in Baghdad under the direction of Bishr ibn al-Mu'tamir (d. 210 AH/825 AD).
As the number of Muslims increased throughout the Muslim empire, and in reaction to the excesses of so-called rationalism, theologians began to lose ground. The problem was exacerbated by the Mihna, the inquisition launched under the Abbasid Caliph al-Ma'mun (d. 218 AH/833 AD). Mu'tazilis have been accused of being the instigators though it was the Caliph's own scheme (Nawas, 1994; Nawas, 1996; Cooperson 2005; Ess, 2006). The persecution campaign, regardless, cost them and theology in general the sympathy of the Muslim masses. Ahmad ibn Hanbal, a Muslim jurist and founder of the Hanbali school of Islamic jurisprudence was a victim of Ma'mun's Minha. Due to his rejection of Ma'mun's demand to accept and propagate the Mu'tazila creed, ibn Hanbal was imprisoned and tortured by the Abbasid rulers.
By the end of the fifteenth century, Mu'tazilis were subjected to vehement attacks from the traditionalists on one hand, and from the atheists, deists, philosophers, non-Muslim thinkers, etc. on the other. It is important to note that the traditionalists, as opposed to Mu'tazili rationalists, were not irrationalists. Both groups operated on the basis of some synthesis between reason and revelation. Jackson (2002) argued against the "fiction" of a strict traditionalist/rationalist dichotomy, and asserted instead that traditionalism and rationalism, in the Islamic context, should be regarded as "different traditions of reason."
In response to the attacks, Mu'tazili theologians refined and made more coherent and systematic their idea system. In Basra, this task was accomplished by the father and son team, Abu 'Ali al-Jubba'i (d. 303 AH/915 AD) and Abu Hashim al-Jubba'i (d. 321 AH/933 AD). The two differed on several issues and it was Abu Hashim who was to have the greatest influence on later scholars in Basra, including the prominent Abd al-Jabbar ibn Ahmed who became the most celebrated proponent of Mu'tazilism in the late tenth and early eleventh century (Martin et al., 1997). Mu'tazilism did not disappear from the Islamic intellectual life after the demise of 'Abd al-Jabbar, but it declined steadily and significantly. Many of the Mu'tazili doctrines and methodologies, nonetheless, survived in the other Islamic schools.
