2013 sees the centenary of Jaspers' foundation of psychopathology as a science in its own right.<br /><br />In 1913 Karl Jaspers published his psychiatric opus magnum - the <em>Allgemeine Psychopathologie (General Psychopathology</em>). Jaspers was working at a time much like our own - with rapid expansion in the neurosciences, and responding to the philosophical challenges that this raised. The idea inspiring his book was very simple: to bring order into the chaos of abnormal psychic phenomena by rigorous description, definition and classification, and to empower psychiatry with a valid and reliable method to assess and make sense of abnormal human subjectivity.<br /><br />After almost one century, many of the concepts challenged by Jaspers are still at issue, and Jaspers' investigation is even now the ground for analyses and discussions. With a new edition of the Diagnostic and Statistical Manual (DSM) imminent, many of the issues concerning methodology and diagnosis are still the su
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