This study tested the hypothesis that values, abstract goals serving as guiding life principles, become relatively important predictors of adolescents' self-reported violent behavior in school environments in which violence is relatively common. The study employed a students-nested-in-schools design. Arab and Jewish adolescents (N = 907, M age = 16.8), attending 33 Israeli schools, reported their values and their own violent behavior. Power values correlated positively, and universalism and conformity correlated negatively with self-reported violent behavior, accounting for 12% of the variance in violent behavior, whereas school membership accounted for 6% of the variance. In schools in which violence was more common, power values' relationship with adolescents' self-reported violence was especially positive, and the relationship of universalism with self-reported violence was especially negative.