What were the differences in tactics and strategies among blacks since 1965?How did this split show in 1980-90?

As over 400 years of African-American history come to a close, blacks have recorded incredible achievements and gains, and yet continue to face ongoing problems of racism, poverty, and other social ills. The black community, meanwhile, remained divided over tactics and strategies for advancement. What are these differences in tactics and strategies among blacks since 1965? How did this split show up in the 1980s and 1990s?