In a Blender magazine interview songstress Alicia Keys let's everyone in on the secret; The government created gangsta rap to convince blacks to kill each other:

We ask what other gangsta rappers she liked. And that’s when Keys drives a steamroller through the wall.

“‘Gangsta rap’ was a ploy to convince black people to kill each other,” she says, putting down the sandwich. “‘Gangsta rap’ didn’t exist.”

Come again? A ploy by whom?

She looks at us like it’s the dumbest question in the world. “The government.”