When we hear the old saying, “an eye for an eye,” we tend to think of primitive or barbaric justice. But this saying actually captures the force of both modern and ancient justice. Aristotle explained that justice requires a recompense for what was lost; accordingly, he called it “retributive,” re-paying justice. Justice corrects for wrongs deliberately enacted, but limits the correction by a principle of proportionality. Were we to strike back for wrongs based solely on our feelings, our actions would turn from justice to revenge, as our retaliation would far exceed the actual injury.