The precipitous decline of the area’s manufacturing base resulted in a loss of a job that allow skilled union worker to have a middle class life in south central los Angeles . The service sector, which had long been dominated by unionized African Americans earning relatively high wages, so they replaced most black worker with newly arrived Mexican and Central American immigrant worker. Because they would work for lower wage and cause of their lack of knowledge of understanding and speaking English. Because of the widespread unemployment, poverty and street contributed to the rise of the street gangs in Los Angeles central, such as like Crips and Bloods because they need money to survive. Many immigrants like the Koreans