Gangs begin to appear in the U.S. right around the end of the American Revolution. In the east region New York was the dominant state of gang development and was highly represented by white gangs which included: the Irish, Italian, Jewish, Dutch and German immigrants who fueled by the immigration and poverty in the area, joined each other to form a support system in the economic struggle. The youth in the other hand, became a gang member seeking to develop a social life among other teens, they didn't become violent until territorial disputes began. Decisions of gang members were also based on public housing projects which were very scattered. Today the East coast has significant gang activity from: Crips, Latin Kings, Bloods, MS-13, Neta, United Blood Nation, and Trinitarios.
Chicago gangs have the strongest presence in the Midwest region, even though there are many other cities who reports serious gang problems like Minneapolis, Kansas City, St. Louis, Detroit, etc. This may be due to the fact that the first gangs were developed in Chicago by the same immigrant group that populated the street gangs in New York City. Even though this gangs disappeared around the 1920's due to the economic stability there families established along with moving out of downtown Chicago to the suburbs , there wasn't much time before black gangs appeared, followed by Latino gangs who brought ties from the Mexican mafia prison gang. Today the most represented gangs among the Midwest region are: Gangster Disciple Nation, Vice Lords, Four corner Hustlers, Black Gangsters Disciple Nation, New Breeds, Latin Kings, Black P. Stone Nation, and Maniac Latin Disciples.
Western gangs appeared due to the annexation that resulted from the Mexican, U.S war, in which Mexicans were alienated from their own homeland by becoming neutralized U.S. citizens but that wasn't enough for the "U.S. citizens" for they constantly told them to go back to their homeland. Not acknowledging that they were in their homeland, this led the Neutralized U.S Mexicans to feel marginalized by their society of origin and the dominant American culture. Due to this reason the youth created Barrios (neighborhood), which were cliques among different neighborhoods to establish friendships. This Barrios became cultural institutions in East L.A. streets and didn't become violent until the appearance of Crips and Bloods who didn't respect their marked territory. On the other hand Crips and Bloods developed because of the violence that they were put through by white students. Today the dominant gangs in the Western region are: East side 40th street gangster crips, Marasalvatrucha 13, Nuestra familia, La Eme, 18th street, Hacienda Village Bloods, and 42nd Street Piru Bloods.
Today the reasons as to why teens join gangs are slightly different but are still very similar for many gang members are immigrants, come from low-income families and aspire a since of community. This is resembled in the book Social Problems p. 290 and also in p. 32 which talks about the displacement of poor people, people of color and the "white flight". These connections make perfect since as to why today gang members are predominantly African Americans, Hispanics, and Asians, in other words immigrants, low-income youth, and feeling alienated.