Betrayal trauma theory offers a transformative lens to understand trauma inflicted by trusted caregivers or institutions. It integrates social, psychological, and evolutionary perspectives to explain why victims often deny or dissociate trauma. The theory deepens our understanding of complex trauma, dissociation, personality disorders, and recovery challenges. Recognizing betrayal trauma’s role in mental health can lead to more compassionate, effective treatments and help dismantle stigmas surrounding trauma-related disorders. Betrayal, Trauma, Dissociation: Roots of Cluster B Personality Disorders (Compilation)