American child psychiatrists have long been interested in the problems of delinquent behaviour by juveniles. With the rise of specific psychiatric diagnoses in the 1960s and 1970s, delinquent behaviour was defined within the diagnosis of conduct disorder. Like all psychiatric diagnoses, this concept was shaped by particular historical actors in context and has been highly contingent on assumptions related to race, class and gender. The history of conduct disorder illustrates the tensions in child psychiatry between the expansive goals of the field and the often limited uses of its professional authority, as well as individual children as the target of intervention and their interactions in groups.