Data were collected from the first six waves of the Cambridge Study in Delinquency Development, conducted in Great Britain between 1961 and 1981. The sample included a cohort of 411 males, aged 8 to 9 years in 1961. The results show that a single factor of low self-control, including minor behavioral conduct disorders, provided a better fit to the data than did the constructs of hyperactivity-impulsivity-attention deficit disorder. The operationalization represented here suggests that the characteristic of self-control is comprised of physical and emotional disregard for the rights of others and may result from conditions signifying poor parental practices. The analysis showed that self-control is moderately stable over time and is inversely related to elements of the bond to conventional society. The combination of self-control and the bond elements predicted future convictions of the London cohort as well as major forms of self-reported deviance. 6 tables, 3 figures, 18 notes, and 87 references