It is a book written by the Arab Islamic thinker Ahmed Amin, which came within an integrated series that deals with Islam from different chapters: "The Dawn of Islam" and "The Day of Islam", in which he talks about the Abbasid era, affiliated with social life, the cultures in that era, and the scientific movement in the Abbasid era The first, beliefs and religious doctrines in it. Amin says in his book, explaining the reason for his choice of the Abbasid era: The Persian element, the freedom of thought to some extent, the state of the Mu''tazilah and their authority, and the coloring of literature from poetry and a color that followed the ages of ages, and the different ages, as well as the conversion of what is in the Arabic tongue into a restriction in the books and recording in the books, and the foreign tongue to the language of the Arabs, which is in All of this contradicts the ages before him and the ages after him, a violation that makes it an existing episode, which is correct to be called, to study, and to distinguish. "
