See Hear Podcast episode 129 - Bad Brains: A Band In DC

Punk music branched out in the late 70s / early 80s into a harder, faster, thrashier style than its earlier predecessor. If (as is often claimed) the original wave of punk was a reaction to the complexity of prog and the lack of danger in other forms of popular music, then hardcore was the next phase of that during the era of post-punk. It was about catharsis and screaming out about injustice.…