Male Criminal Activity From Childhood Through Youth reports the results of a large longitudinal study from 1972 to 1985 on a sample of delinquents and a comparison sample of the population in Montreal. A clarification emerges from this extensive study: how to describe criminal activity in a comprehensive theory of crime which integrates the offense, offending, and patterns of offending. Using a developmental approach, Drs. Le Blanc and Frechette observed a gradation of crimes with subjects progressing through five distinct stages of offending. In all, the research investigates the factors that sustain the development of offending and the mechanisms which accelerate, stabilize, and decelerate the commission of crimes. This book represents a significant advance in the understanding of the development of criminal activity.