Perpetration-induced traumatic stress
A pattern of post-traumatic symptoms that arises in people whose harm came from being the one who did it — soldiers, executioners, police, slaughterhouse workers — rather than from being a victim or a bystander. The claim is that this perpetrator case has its own distinct shape, one that a trauma category built around victims tends to hide. It stays inside the psychiatric frame and asks for refinement within it.
Rachel MacNair's term for a configuration of PTSD symptoms presenting in those whose trauma exposure came from being the active agent of harm rather than from being the victim or the witness — soldiers, executioners, police, abortion providers, slaughterhouse workers. The argument is that the perpetrator case has its own symptom pattern that the victim-built diagnostic category PTSD obscures.
Etymology§
Coined by MacNair in Perpetration- Induced Traumatic Stress: The Psychological Consequences of Killing (Praeger, 2002), on the basis of secondary-data analysis of the National Vietnam Veterans Readjustment Study supplemented by case material from the other perpetrator populations. The term is constructed in deliberate contrast to the existing PTSD diagnostic frame — perpetration-induced as the qualifier that distinguishes the construct from the victim-induced and witness-induced cases.
PITS is the principal adjacent diagnostic construct to contemporary moral injury and the most direct predecessor of the perpetration-side of the Litz-style framework. The two constructs overlap heavily on the perpetration case but diverge on three substantive points.
PITS stays inside the psychiatric-diagnostic frame and argues for refinement within it; moral injury argues that the relevant phenomenon exceeds the psychiatric frame. PITS centres on the act of killing specifically; moral injury counts betrayal (Shay) and witnessing (Litz) alongside perpetration. PITS is articulated within a peace-research and consistent-life-ethic framework; moral injury is largely articulated within VA / DoD clinical research. The differences are not technical only — they reflect underlying disagreements about what the construct is and what discipline owns it.
For the moral-injury corpus PITS is worth reading as the substantive predecessor that the post-2009 literature partly absorbed and partly set aside. The 2009 Litz paper does not cite MacNair explicitly, but the potentially morally injurious event taxonomy is recognisably an extension and reframing of her perpetrator-trauma analytic. Reading the two side by side makes visible what consolidating moral injury as the field's working construct preserved and what it lost.