There is something undeniably satisfying about revenge. When we feel we have been aggrieved, harmed or humiliated, it is natural to want payback. In ancient Greece, to inflict such an injury was conceived of as incurring a debt — and the only way to make the perpetrator “whole” was to have the injury repaid in kind.

The paradox — as Socrates, Sophocles and Euripides all knew — is that revenge, though it is desired, is never satisfying, because it gives rise to a perpetual cycle of hit-and-retaliation. The future is thereby foreclosed by the need to repay the past. As Martin Luther King, Jr. put it: “Returning hate for hate multiplies hate, adding deeper darkness to a night already devoid of stars.”

In democratic politics and geopolitical conflict, the language and logic of revenge have begun to reassert themselves. What can be done to break out of its hold?