 Averroes’ best known philosophical doctrine holds that there is only one intellect for all human beings. The doctrine is sometimes labelled “monopsychism”, but this is a problematic term, since Averroes’ unicity thesis concerns the intellect, not the soul. Averroes’ theory has an epistemological and an ontological purpose. On the one hand, Averroes wants to explain how universal intelligibles can be known, on the other hand, he wants to account for Aristotle’s claim that the intellect is pure potentiality and unmixed with the body (Comm. magnum De anima III.5). Many scholastic readers were troubled by the problem of whether the material (or potential) intellect, if it is one, can be the form of the body. This problem was not directly addressed by Averroes himself, but by many of his Latin partisans.