Vietnam, introduction of drugs into our communities in numbers and at prices not seen before, end of the black power movement and the rise of gang warfare to control drug turf, for-profit prisons and union breaking as well as manufacturing jobs going overseas plus the rise of the Japanese auto manufacturers all had something to do with it. Take away a man's ability to earn a job and he will resort to crime to feed his family. Marginalize black students in school or pack mostly black public schools with unmotivated teachers and the students will perform poorly. Incarcerate black men at an extreme rate and you will leave a vacuum in the black community that gangs will fill. We were doing ok in the 40s and 50s even though we were poor.
To me it is obvious that integration backfired and that we need our own nation with our own CJ system and our own law enforcement protocols. White people are incapable of treating us like they treat their own and since they constitute the dominant society, things will never change. We need to do something else because what we have now is not working and it will not work. Whites are pushing back against latinos now and their conflicts will only get more violent as they become the dominant society through population growth.