History of gang violence Gangs have been in existence every since the rise of humanity.
Humans have always banded together for mutual protection and support - and to better dominate others.
By the 1970s and 1980s, there were national gang alliances, with gangs moving out of Los Angeles and New York City, and spreading across the country, with affiliates in many towns, as well as drug routes to finance gang activities.
Teen violence between opposing bands, as well as senseless violence, flourished.
Gang violence is very real, and is a problem in some cities and schools.