There are multiple reasons to prevent juveniles from becoming delinquent or continuing to engage in delinquent behaviour. The most obvious reason is that delinquency puts youth at risk for substance abuse and delinquency, school drop-out, gang involvement, criminality, and mental health challenges. Youth engaging in delinquent behaviours are also vulnerable to physical injury, early pregnancy, domestic violence and sexual assault. To address issues of juvenile delinquency, this book describes various youth and family risk and protective factors associated with delinquency and provides a description of various family-oriented treatment options for preventing and treating youth violence and aggression. The authors also examine how sociometric status influences childhood bullying, aggressive behaviour and victimisation. Special attention is given to the affect of sociometric neglect and rejection on child development. In addition, this book summarises the transformation of youth gangs and violence associated with them, the basis of interventions to reduce youth gang affiliation and aggression in these different eras. To conclude, implications for the prevention and treatment of juvenile crime are presented, as well as recommendations for extinguishing violent and aggressive beliefs and behaviours in children.