Manic-Depressive Illness: Evolution in Kraepelin's Textbook , 1883–1926

Abstract

Kraepelin responded to a compelling international need for diagnostic order in nineteenth-century psychiatry, and effectively promoted his diagnostic proposals with a widely used and influential textbook. Though his methods were less empirical than is usually realized, his legacy includes analysis of large clinical samples to describe psychopathology and illness-course, along with efforts to define psychobiologically coherent and clinically differentiable entities, as steps toward defining psychiatric syndromes. Modern international "neo-Kraepelinian" enthusiasm for descriptive, criterion-based diagnosis should be tempered by Kraepelin's own appreciation of the tentative and uncertain nature of psychiatric nosology, particularly in classifying illnesses with both affective and psychotic features.