If interpretation is the violent or surreptitious appropriation of a system of rules . . . in order to impose a direction . . . and to subject it to secondary rules, then the development of humanity is a series of interpretations. The role of genealogy is to record its history .... effective history [finding its subject in the event. By event is meant]. .... the reversal of a relationship of forces, the usurpation of power, the appropriation of a vocabulary turned against those who had once used it.