Delusional diagnosis?: the history of paranoia as a disease concept in the modern era

The concept of paranoia as a distinct illness was proposed by Emil Kraepelin (1856-1926), opposed by followers of Sigmund Freud and Adolph Meyer, and then repopularized by the authors of the Diagnostic and Statistical Manual of Mental Disorders. The concept's continued popularity will depend on how well it fits into new, pharmacologically driven diagnostic systems.