Diagnosis and conceptualization of mental illness
This chapter outlines the evolution of psychiatric understanding of mental disorders utilizing seven landmark texts that have informed current nosology. Important themes reviewed in this chapter include the foundational distinction between dementia praecox and manic-depressive insanity (Emil Kraepelin), drastic diagnostic differences between American and British psychiatrists reported in the 1970s (the US–UK diagnostic project), development of operationalized diagnostic criteria (Feighner criteria), the biopsychosocial model (George Engel), the philosophical account of mental disorder as harmful dysfunction (Jerome Wakefield), the endophenotype concept (Irving Gottesman and Todd Gould), and the Research Domain Criteria (RDoC) by the National Institute of Mental Health. Historical and theoretical links between these different texts and thinkers are highlighted and are offered to the reader in an integrated narrative of psychiatry’s conceptual development.