Protest Songs Mid to late 20th Century w/citations
The non-stop activism in the music of Rage Against the Machine debuted in the 1990s. And Oi! music also noted a resurgence - important to the topic of protest songs in such bands' countless lyrics devoted to the mistreatment of veterans.
A wide variety of rap from acts such as NWA, Public Enemy and others picked up the slack, focusing on the ills of government, including the shuffling off of black men to war to die.
U2 and the Cranberries were both beacons of music advocating non-violence.