The Incoherence of the Philosophers is a landmark 11th-century work by the Muslim polymath al-Ghazali, a student of the Asharite school of Islamic theology, criticizing the Avicennian school of early Islamic philosophy. Muslim philosophers such as Ibn Sina (Avicenna) and al-Farabi (Alpharabius) are denounced in this book, as they follow Greek philosophy even when, in the author's perception, it contradicts Islam. The text was dramatically successful, and marked a milestone in the ascendance of the Asharite school within Islamic philosophy and theological discourse.