In the history of music, there has never been a genre that has promoted progressive ideals similar to the impact of Hip Hop.
Genres like rock, country, and dubstep only promote cultural and societal stagnation. In fact, I challenge you to name a genre (that’s not classical) which rivals the progressiveness of hip-hop.
Here’s an example of hip hop promoting good ideas:
Lil’ Wayne is this century’s Ludwig Van Beethoven.