i just recently read this theory
Distressing events or experiences, whether subtle (e.g., a child's interpretation of a parent's facial expression) or blatant (e.g., terrorism that kills thousands), can have traumatic effects when they threaten basic needs to be safe, to trust, to feel some control over one's life, to be valued, and to feel close to others (Saakvitne & Pearlman, 1996).