I wouldn't say that negro culture = hip-hop culture.    Hip-hop culture is just the lowest degeneration they've figured out so far. I would consider it modern negro culture, but I wouldn't go so far as to say it presently represents the culture of all negroes. Probably just about all of the younger generation, though.    Remember, negro culture USED to be a shadow of more civilized culture, and there are probably still some crotchety older folks who keep their blues records going and don't like the youngster racket.    However, within 30 years I fully expect that hip-hop culture will be negro culture, unless they come up with something even worse in the meantime.