Whatever else it may be, the study of political revolution is the study, in a given case, of competing and incompatible assertions regarding the legitimation or justification of violence. This is true because: Since, as Weber put it, the state by definition possesses the legitimate monopoly of violence, and to propose radical changes in the character of a state, as happens in political revolutions, is to propose a radical alternative to the existing pattern of legitimating violence. In short, a revolution is, among other things, a contest over who may properly employ violence under what circumstances.