The adventure of Mu'tazilite thought constitutes an exceptional experience in the history of Arab thought, because this experience presented its critical adventure in isolation from Indian and Greek thought, despite the artificial noise that was raised about its influence by them. Since the time of Ghailan al-Dimashqi, the first Qadariyya movement was formed in Damascus, but Marwan ibn Muhammad was able to extinguish this movement twice, which forced it to travel to Basra and develop its five principles under the title of "Mu'tazila" in the time of Wasil ibn Ata' and Amr ibn Ubayd. Soon, the generation of al-Nazzam and al-Allaf was able to invent some unique basic theories and concepts that deserve review and examination.
The book follows the history of Mu'tazila in all its stages, and explores Al-Ma'mun's desire to transform it into a saving creed and a sound Sunnah, then the apostasy that occurred in the era of Al-Mutawakkil when he turned the ordeal against the Mu'tazila. Since Mu'tazila is a movement that spans a time period of nearly six centuries, the book provides a brief summary of the ideas of the most important Mu'tazila figures, such as Al-Jahiz
