Pink Floyd?
No, the band's name was "Rage Against the Machine". Fairly modern, at least much more recent than Pink Floyd. I doubt many people here would enjoy their music, it's fairly hard rock, but the lyrics are very politically motivated, challenging people to stand up and act. If you still listen to current rock, you would probably recognize the band by their new name, "Audioslave". The lead singer was the one who wrote the politics-related songs, however, and he no longer is with them, so Audioslave's lyrics are nothing like what they used to write.