 Ibn Rushd (“Averroes” in Latin; 1126–98) was an Islamic judge and legal theorist, servant of the harshly anti-Jewish and anti-Christian Almohad regime, and also perhaps the most devoted Aristotelian of the Middle Ages. Whereas scholars in the Islamic East used Avicenna for studying falsafa, Averroes commented the letter of Aristotle’s text, as the Baghdad Peripatetics had done. He wrote short and “Middle” paraphrase commentaries on almost the entire Aristotelian corpus, and “Great” (detailed section by section expositions) on some of the texts. These detailed expositions of Aristotle proved invaluable to the Jewish and Christian scholars who read them in translation  (§1.3.3,  §1.3.4), although his interpretation of On the Soul in his Great commentary would prove very controversial  (§3.3)  (see also entry on  Ibn Rushd’s natural philosophy)  .