Protest songs?

I'm writing an essay/paper for an English class, and I need some help picking songs. The prompt was to evaluate the way people used forms of protest to make change, and I'm using music. I want to use some Rage songs, but I need some help with the context of them. Since I wasn't around when they came out it'd be helpful if someone could like dumb them down a bit for me? I'm wondering if some of their songs are about specific events, or general anti-gov't/corruption? Thanks guys!