Abstract

Because other cultures classify mental disorders very differently from ours, it behooves us to inquire into the philosophical and cultural sources of our own guiding nosological categories. This paper is a philosophical exploration into the historical and theoretical bases of the late nineteenth-century, Kraepelinian division between disorders of mood or affect, and schizophrenia, in which our present day nosological categories are rooted. By tracing the early nosologists’ divisions into eighteenth-century and Kantian faculty psychology, and following the fate of faculty psychology through the nineteenth century, we discover genealogical elements of our taxonomy likely to affect clinical diagnosis and understanding.