“This major new study, by one of the most penetrating and persistent critics of philosophical and scientific orthodoxy, returns to Aristotle in order to examine the salient categories in terms of which we think about ourselves and our nature. An overview of the concepts of substance, causation, power and agency provides the background for an investigation into teleology, rationality and explanations of behaviour in terms of reasons. This is the stage-set for the analysis of the concepts of mind, self, body and person.”–BOOK JACKET.