Personality, self-control, and welfare-tradeoff ratios in revenge and forgiveness.

We address how trait self-control and trait concern for others relate to the concepts of monitored and intrinsic Welfare Tradeoff Ratios (WTRs), respectively, and how recent work on personality, revenge, and forgiveness are informed by the adaptationist perspective proposed in the target article. We also discuss how the proposed adaptationist perspective provides clues to some previously puzzling findings on revenge.