Moffitt’s developmental taxonomy describes a small group of adolescents who abstain from all forms of delinquency because they are isolated from peer groups or because, unlike most adolescents, they lack the desire to engage in “adult-like” behaviors, such as drinking and smoking. Based on Moffitt’s work, this study examines the correlates of abstention for males and females, focusing on negative personal characteristics that may isolate youth from their peers. Using a sample followed from birth through adulthood, the authors found that although many prosocial characteristics are associated with abstention, individuals who refrain from delinquency are also more likely than offenders to possess undesirable personal characteristics. Still, abstainers are more likely than other youth to become successful, well-adjusted adults.