This issue of Psychiatric Clinics, edited by Dr. James Knoll, is dedicated to violence and the psychological ramifications of violence in a wide array of situations. Subjects covered include, but are not limited to, violence by parents against children; gender and violence; lone wolf terrorists; inpatient violence; neuroimaging violence; workplace violence; gun violence; the military perspective on violence; homicides; suicides; sex offender risk and management; and psychopharmacology.