Ambivalence towards kings, and other sovereign powers, is deep-seated in medieval culture: sovereigns might provide justice, but were always potential tyrants, who usurped power and 'stole' through taxation. Rebel Barons writes the history of this ambivalence, which was especially acute in England, France, and Italy in the twelfth to fifteenth centuries, when the modern ideology of sovereignty, arguing for monopolies on justice and the legitimate use of violence, was developed. Sovereign powers asserted themselves militarily and economically provoking complex phenomena of resistance...