Governments increasingly offer or demand apologies for past human rights abuses, and it is widely believed that such expressions of contrition are necessary to promote reconciliation between former adversaries. The post-World War II experiences of Japan and Germany suggest that international apologies have powerful healing effects when they are offered, and poisonous effects when withheld. West Germany made extensive efforts to atone for wartime crimes-formal apologies, monuments to victims of the Nazis, and candid history textbooks; Bonn successfully reconciled with its wartime enemies....