Book excerpt: Aversive behaviors have greater influence on social interactions than is generally acknowledged, determining personal satisfaction, interpersonal attraction, choice of partners, and the course of relationships. What motivates aversive behaviors? To what extent do they obtain desired outcomes? In what ways are they unnecessary and destructive? How do other people respond, emotionally and behaviorally? These are just a few of the many interesting questions addressed by the 16 respected researchers who contribute to Aversive Interpersonal Behaviors. Nine chapters give this heretofore neglected subject the attention it is due, probing a dark side of interpersonal relationships to understand both its destructive and adaptive nature.