Youth and street gangs thumb|upright=0.65|Jamaican gang leader Christopher Coke An estimate on youth street gangs in the United States provided by Hannigan, et al., marked an increase of 35% between 2002 and 2010. A distinctive gang culture underpins many, but not all, organized groups; this may develop through recruiting strategies, social learning processes in the corrective system experienced by youth, family or peer involvement in crime, and the coercive actions of criminal authority figures. The term "street gang" is commonly used interchangeably with "youth gang," referring to neighborhood or street-based youth groups that meet "gang" criteria. Miller (1992) defines a street gang as "a self-formed association of peers, united by mutual interests, with identifiable leadership and internal organization, who act collectively or as individuals to achieve specific purposes, including the conduct of illegal activity and control of a particular territory, facility, or enterprise."Miller, W.B. 1992 (Revised from 1982). Crime by Youth Gangs and Groups in the United States. Washington, DC: U.S. Department of Justice, Office of JusticePrograms, Office of Juvenile Justice and Delinquency Prevention. Some reasons youth join gangs include to feel accepted, attain status, and increase their self-esteem. A sense of unity brings together many of the youth gangs that lack the family aspect at home.
Youth and street gangs thumb|upright=0.65|Jamaican gang leader Christopher Coke An estimate on youth street gangs in the United States provided by Hannigan, et al., marked an increase of 35% between 2002 and 2010. A distinctive gang culture underpins many, but not all, organized groups; this may develop through recruiting strategies, social learning processes in the corrective system experienced by youth, family or peer involvement in crime, and the coercive actions of criminal authority figures. The term "str.eet gang" is commonly used interchangeably with "youth gang," referring to neighborhood or street-based youth groups that meet "gang" criteria. Miller (1992) defines a street gang as "a self-formed association of peers, united by mutual interests, with identifiable leadership and internal organization, who act collectively or as individuals to achieve specific purposes, including the conduct of illegal activity and control of a particular territory, facility, or enterprise."Miller, W.B 1992 (Revised from 1982). Crime by Youth Gangs and Groups in the United States. Washington, DC: U.S. Department of Justice, Office of JusticePrograms, Office of Juvenile Justice and Delinquency Prevention. Some reasons youth join gangs include to feel accepted, attain status, and increase their self-esteem. A sense of unity brings together many of the youth gangs that lack the family aspect at home.