 We know that Alexander had to defend the Aristotelian position against the Stoics in such an important matter as destiny or fate. In his book On Destiny Alexander admits fate in Nature but not as governing human acts. While the final cause appears in planned changes as external to them, “the creations of Nature have the principle and cause of such generation within themselves” (De fato 168). Alexander’s treatise On Providence was well known to Averroes who paraphrased part of it in his “Short Commentary on the Metaphysics”, as R. Arnzen has proved (Arnzen 2010: 331–335). This is the context within which we may interpret the short quotation Averroes makes of Alexander and Averroes ends it adding “purpose is indeed the main cause” (LC 83A TC88).