Community: availability of firearms (V) availability of drugs (D) community laws and norms favorable toward firearms and crime (V) community laws and norms favorable toward drug use (D) media portrayals of violence (V) transitions and mobility (D) low neighborhood attachment and community disorganization (V, D) extreme economic deprivation (V, D) Family: family history of substance abuse (D) family management problems (V, D) family conflict (V, D) favorable parental attitudes toward and involvement in violence (V) favorable parental attitudes toward and involvement in drugs (D) School: early and persistent antisocial behavior (V, D) academic failure, beginning in elementary school (V, D) lack of commitment to school (D) Individual/Peer: alienation and rebelliousness (D) friends who engage in violence (V) friends who engage in drug use (D) favorable attitudes towards drugs (D) early initiation of violence (V) early initiation of the use of drugs (D) constitutional factors (V, D)