Freud was right: mind and brain evolved together, adapting progressively to cultural change; responding regressively to wars, genocides, and forced migrations. Freud traced innate conflicts between pleasure and aggression in each stage of individual development to corresponding development in cultural stages. Cultural trauma that induces PTSD with a loss of secure identity in one generation induces collective phantasies (mythologies) among succeeding generations, and this may form cultural syndromes of revenge and restitution. Families, tribes, clans, and religious communities can regress...