At the 2nd century of the Hijra, a new movement arose in the theological school of Basra, Iraq. A pupil, Wasil ibn Ata (AD 700–748), who was expelled from the school of Hasan of Basra because his answers were contrary to then-orthodox Islamic tradition and became leader of a new school, and systematized the radical opinions of preceding sects, particularly those of the Qadarites. This new school was called "Mutazilite" (from i'tazala, to separate oneself, to dissent) that lasted from the 8th to 10th centuries. Its principal dogmas were three: