In 146 BC, the armies of the Roman Republic destroyed Carthage and Corinth, two of the most spectacular cities of the ancient Mediterranean world. It was a display of ruthlessness so terrible that it shocked contemporaries, leaving behind deep scars and palpable historical traumas. Yet these twin destructions were not so extraordinary in the long annals of Roman warfare. In Spare No One, Gabriel Baker convincingly shows that mass violence was vital to Roman military operations. In...