The 1970s was an interesting time in regard to how the masses chose to label music genres. During this decade, R&B was used as an all-encompassing ... of the hottest R&B songs that was released ...

However, it's not so much that R&B has completely disappeared into a musical abyss but rather that the genre has changed over time ... a list of 25 of the greatest R&B songs of the '90s.

From Pete Seeger to Billie Holiday to Rage Against the Machine to Kendrick Lamar, musicians of all genres have spoken truth to power ...

The history of rap music, all things considered, doesn't go back too far. The genre came out of New York in the late 1970s ...