Gangs have existed in the US for many decades. While gang involvement increased in the late 1980s and early 1990s, numbers started declining in the late 1990s. Gangs are typically made up of young males seeking belonging, protection, and status. Like other groups, gangs form due to human desires for psychological and resource security through emotional bonds. While criminal activities are concerning, gangs fulfill normal human needs similarly to other organizations through features such as colors, initiation, hierarchy, and recruitment. Effective prevention focuses on strengthening communities and families to reduce the attractiveness of gang involvement.