To reveal how membership in adolescent street gangs influences human development, the authors examine the origins of gang membership and the social and psychological factors that lead to joining. After demonstrating that gang members are responsible for the major share of serious and violent delinquency, they indicate how membership facilitates delinquent behavior and other developmental problems such as teen pregnancy and school dropout.

To reveal how membership in adolescent street gangs influences human development, the authors examine the origins of gang membership and the social and psychological factors that lead to joining. After demonstrating that gang members are responsible for the major share of serious and violent delinquency, they indicate how membership facilitates delinquent behavior and other developmental problems such as teen pregnancy and school dropout.