The rich and important debate over tyrannicide, in which Julius Caesar figures centrally, engaged the best political minds of antiquity, the Middle Ages, and the Renaissance and raged with particular intensity during Shakespeare's time. The tremendous upheaval of the Reformation and Counter-Reformation ignited fiery polemics on the rights of subjects and on the nature and foundations of civil order. At various times Protestants and Catholics arose to challenge the authority of the earthly crown and to claim the right of deposition and tyrannicide. Monarchomachs like Christopher Goodman, John Ponet, George Buchanan, François Hoffman, Théodore de Bèze, the author of Vindiciae Contra Tyrannos, the Ligue, and the Jesuits Robert Persons, Francisco Suarez, and Juan de Mariana drew upon the classics (especially Aristotle), the Bible, and other works (especially those of Aquinas, Salutati, and Bartolus) to reexamine fundamental assumptions about political order.