[testbot123]

I should also clarify that this history is focused on the Los Angeles area around 1960s-1990s, viewed from the lens of the drug war. Gangs had existed in the country for a long time before the 60s (and in LA, too -- Bloods and Crips), but the proliferation of crack into the US via Los Angeles caused an explosion in the crime rate.

For brevity's sake, I'm also ignoring a lot of other serious issues related to police relations with the citizens of LA (e.g., Watts riots in '65, Rodney King in '92), which should be considered to paint a full picture of the antagonisms that have led us to where we are today. The drug war didn't create gangs (they existed before), but it poured fuel on the fire which led to a lot of the violence in that area in the 80s/90s.