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Aristotle’s Discovery of Matter

The thesis that Aristotle had a conception of matter from his first philosophical period has important implications for the study of his System äs well äs for an understanding of his intellectual development. I shall argue (I) that the reasons given for the Happ thesis embody a serious misconception, (II) that there is evidence that Aristotle did not have a doctrine of matter in his earliest period, and (III) that Aristotle comes to a concept of matter in Physics 1.1 shall call his formulation of a concept of matter his discovery of matter. By 'matter' I shall mean the material substratum for substances, which together with form constitutes the individual substance. This seems to be the conception of matter which Happ has in mind, äs will become clear from what follows.