A detailed genealogy of the concept of trauma in modern thought, largely structured around the dichotomy the author perceives between "mimetic" and "anti-mimetic" approaches to trauma. The last 1.5 chapters an extended, usually apt, critique of Caruth for misreadings of Freud, logical inconsistencies, and alarming ethics. Doesn't bear much at all on collective memory, except perhaps for the critique of Caruth.