The concept of personality disorders rose to prominence in the early twentieth century and has consistently caused controversy among psychiatrists, psychologists, and social scientists. In Personality Disorders, Allan V. Horwitz traces the evolution of defining these disorders and the historical dilemmas of attempting to mold them into traditional medical conceptions of disorder.
Using the Diagnostic and Statistical Manual of Mental Disorders, or DSM, as a guide, Horwitz explores the group of conditions that make up personality disorders and considers when they have been tied to or separated from other types of mental illnesses. He also examines how these disorders have often entailed negative moral and cultural evaluations more focused on perceived social deviance than on actual medical conditions.
Deep conflicts exist in a variety of disciplines in determining the nature of these disorders. During the twentieth century, a particularly sharp division arose between researchers who study personality disorders and the clinicians who treat them. Synthesizing historical and contemporary scholarship, Horwitz examines controversies over the definitions and diagnoses of personality disorders and how the perception of these illnesses has changed over time.

Post-traumatic stress disorder-and its predecessor diagnoses, including soldier’s heart, railroad spine, and shell shock-was recognized as a psychiatric disorder in the latter part of the nineteenth century. The psychic impacts of train crashes, wars, and sexual shocks among children first drew psychiatric attention. Later, enormous numbers of soldiers suffering from battlefield traumas returned from the world wars. It was not until the 1980s that PTSD became a formal diagnosis, in part to recognize the intense psychic suffering of Vietnam War veterans and women with trauma-related personality disorders. PTSD now occupies a dominant place in not only the mental health professions but also major social institutions and mainstream culture, making it the signature mental disorder of the early twenty-first century.
In PTSD, Allan V. Horwitz traces the fluctuations in definitions of and responses to traumatic psychic conditions. Arguing that PTSD, perhaps more than any other diagnostic category, is a lens for showing major historical changes in conceptions of mental illness, he surveys the conditions most likely to produce traumas, the results of those traumas, and how to evaluate the claims of trauma victims.