You’re dead to me! The evolutionary psychology of social estrangements and social transgressions

In our species, social connections with a broad array of individuals are foundational to success. On the flip side, we have evolved so as to not be exploited by others. This dynamic is the focus of the studies described here. Study 1 examined the psychology of social estrangements. The main prediction was that the number of estrangements one has would be predictive of various adverse psychological outcomes. Using a sample of 315 young adults, we found evidence for this prediction: A high number of estrangements corresponded to high scores on depressive tendencies and anxious attachment as well as low scores on social support. In Study 2, using a between-participants methodology, we manipulated transgression intensity, target of the transgression, and whether an apology was included. 288 young adults participated. Each participant was presented with a set of stimuli representing one level of each of the three independent variables and then provided ratings for several dependent variables, such as how angry and betrayed he or she would feel in the situation. Transgression intensity and target of the transgression had consistent significant effects on the dependent variables in the predicted directions. Presence of an apology generally had little effect. In both Studies 1 and 2, high scores on the Dark Triad predicted the outcomes as well: In Study 1, a high number of estrangements corresponded to high scores on the Dark Triad. In Study 2, high scores on the Dark Triad corresponded to strong negative responses to social transgressions. Implications for the evolutionary psychology of interpersonal relationships are discussed.