I had this thought earlier about Untitled. He directly confronted race, politics, and media in America before the onset of the hyper fragmented political climate we have today. 17 years later, I'm not sure how many rappers on a major label have even attempted to do the same on a full length project.
Kendrick did with To Pimp A Butterfly
Common did with Black America Again
Lupe Fiasco did in an esoteric fashion with Drogas Wave
Those are the only three.