David P. Farrington was born in 1944 in England and is Emeritus Professor of Criminology at the University of Cambridge. He is director of the Cambridge Study in Delinquent Development (CSDD), which wasinitiated in 1961 by Donald West with 411 males in London, England, who are still followed. The study advanced knowledge about offending and antisocial behavior; drug and alcohol use; risk factors for aggression, violence, bullying, and intimate partner violence from childhood to adulthood; and the relationship between offending and other life problems, such as in accommodation, relationships, and employment. It has advanced knowledge about risk factors for offending, especially those measured in childhood, such as impulsiveness, low school achievement, poor parental supervision, and disrupted families. It has also advanced knowledge about the effects of life events – such as getting married, becoming separated, and becoming unemployed – on the course of development of offending, as well as the intergenerational transmission of antisocial behavior. Farrington has consistently advocated for early intervention targeting risk factors in order to reduce offending.For example, poor parenting can be targeted using home visiting and parent management training, impulsiveness can be targeted with skills training, and low achievement can be targeted in preschool intellectual enrichment programs.