Abstract Mu'tazila is one of the schools of kalam that appears in Islamic intellectual history. Although considered a heresy, the Mu'tazilite scholars played an important role in the development of various traditional Islamic disciplines. Initially, Western historians considered Mu'tazila rationalism as an anomaly in Islamic history. However, various studies show that they are not only an integral part of the Islamic intellectual tradition, but they have also even influenced Islamic scholars from various Islamic schools of thought in the next generation. This article will focus on the narrative of the Mu'tazila in Western scholarship by focusing on the history of its early emergence and development, the originality of the theological and ph...