Aggregate analyses show that values reflecting a subculture of violence have substantial effects on the level of interpersonal violence among high school boys. Contextual analyses suggest that the school subculture of violence operates through a social control process. A contextual measure of school values regarding violence has a direct effect on interpersonal violence, controlling for individuals' commitment to these values. The results contradict the usual explanation of how the subculture of violence affects personal behavior. Further, evidence implying that values regarding violence predict other forms of delinquency suggests that the results may reflect a subculture of delinquency rather than a subculture of violence. Finally, young males are most likely to engage in delinquency when they go to schools where academics are valued, controlling for their own academic values. Figure, tables, notes, references