In their introductory chapter, the authors establish the essential theoretical rationale for their model. Drawing on work previously done by Miller, the authors rely on trauma reenactment theory to develop their treatment model. This theory asserts that survivors tell the stories of their abuse through a series of current self-damaging behaviors, such as drug and alcohol addiction, anorexia, bulimia, self-injuries, somatic complaints, body-based illnesses, and abusive relationships. The treatment approach, known as ATRIUM (addiction and trauma recovery integration model), understands all these self-harming behaviors as the "best way" available to a trauma survivor to express the dynamics of the traumatic experience.