Hip Hop is a surprisingly old genre of music that started with the Griots of Western Africa hundreds of years ago. They went around reciting poetry over a beat about social issues like peace. It then became more famous in the US in the 80's when Cool G Rap rediscovered it. It had many legends, like Ice Cube. But today it is very weak, as underground, councius, and Gangsta rap are weak forces and mainstream is strong. It is polluted with people who rap about materialistic garbage.