Trauma is defined as a sudden, potentially deadly experience, often leaving lasting, troubling memories. Traumatology (the study of trauma, its effects, and methods to modify effects) is exploding in terms of published works and expanding in terms of scope. Originally a narrow specialty within emergency medicine, the field now extends to trauma psychology, military psychiatry and behavioral health, post-traumatic stress and stress disorders, trauma social work, disaster mental health, and, most recently, the subfield of history and trauma, with sociohistorical examination of long-term effects and meanings of major traumas experienced by whole communities and nations, both natural (Pompeii, Hurricane Katrina) and man-made (the Holocaust, 9/11).
