 Mu'tazili theology originated in the 8th century in Basra when Wasil Ibn 'Ata' stormed out of a lesson of Hasan al-Basri following a theological dispute.The Mu'tazila asserted that everything in revelation could be found through rational means alone.The Mu'tazila were heavily influenced by the Greek philosophy they encountered and began to adopt the ideas of Plotinus, whose Neoplatonic theology caused an enormous backlash against them.