In 1960, peer, parental, and teacher data on school aggression were collected for 870 third-grade children. Interview or mail survey data were obtained for 409 of the original subjects and mental health and criminal justice data were obtained for an additional 223 of the original subjects. Interviews also were conducted with 165 spouses and 82 children of these subjects. Results indicate some predictability of later aggression and early aggression over 22 years, especially for males. Early aggression and IQ were negatively correlated, and continued to be correlated on later measures, including aggression toward spouse, punishment of offspring, traffic violations, criminal justice convictions, and offense seriousness. In addition, data indicated an intergenerational effect. In 1960, there was a relationship between how aggressive subjects were assessed by peers and how severely they were punished for aggression by their parents. In 1981, a similar correlation was found between the early aggression level and how severely subjects reported punishing their own children's aggression and between the early aggression score and their children's self-reported aggression. 12 references.