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This article studies the methodology of political thought in the west of the Islamic civilization. The philosophy of the west of the Islamic civilization refers to the philosophical thoughts in the works of philosophers such as Ibn-Tofeil, Ibn-Bajeh, and Averos. Contrary to the thinkers of the east of the Islamic civilization such as Avecina, they had a specific methodology in political science. They believed that political reason had its roots in religion and at the same time supported and criticised the religious precepts of politics - religious politics - with logical reasoning. Thus, a kind of methodology centered on interpretation formed in the philosophy of the west of the Islamic civilization. It is now called the Islamic hermeneutics or the Averosian hermeneutics. This article is a methodological analysis of the theory and its implications for the political science.