K'naan

I don't like rap music, but this guy is a little different.  I like the fact that he is actually a poet/philosopher, and then puts his words over a beat.  He "raps" about his life as a child and how hard it was growing up in Somalia.  His rhymes are often about anger and sorrow.  But he does make mention about how to fix the problem, about how the pursuit of power is what lead to the suffering; he shares this common idea with many philosophers.
If you are curious about what he sounds like, listen to this:
http://www.knaanmusic.com/music/