This Palgrave Pivot examines how prominent thinkers throughout history, from ancient Greece to sixteenth-century France, have perceived tyrants and tyranny. Ancient philosophers such as Plato and Aristotle were the first to build a vocabulary for tyrants and the forms of government they corrupted. Thirteenth century analyses of tyranny by Thomas Aquinas and John of Salisbury, revived from Antiquity, were recast as short observations about what tyrants do.