He then turned his attention to writing a comprehensive survey of psychopathology. He aimed, as he explained in the preface to PP, to update Jaspers, especially by including the perspective of neuropsychology. But, in the course of this ambitious, if still relatively conventional, undertaking, he encountered the work of Bergson, Schoperhauer, Scheler, Heidegger, and other 19th- and 20th-century philosophers, and he recognized that they tended to a view of metaphysics that paralleled and enriched his own thinking about psychopathology. Each hemisphere could be understood as creating an experiential world, as had been described, such as were measured by neuropsychologists. Hence, the subtitle of PP: Two Minds—Two Worlds—Two Hemispheres. By now, we are well outside the conventional ambit of general psychopathology. Having made this realization, Cutting was forced (by his own substantial sense of intellectual rigor) to pursue the foundations of psychopathological understanding as these could be illuminated by contemporary philosophy. As he puts it, “my approaches to psychopathology … reveal a path whereby a committed scientist becomes a disillusioned scientist, and then, perforce, philosopher because of the facts facing him” (LDNA p. 165, emphasis in original). This path led from PP to the subsequent volumes under review.