Crass - So What

It's heartening to see/hear a little of the punk spirit coming back into music these days (see Idles, Honeyblood, Savages, Sleaford Mods etc) but will there ever be a more 'punk' outfit than Crass eh? I'm sure there's a load of footage, docs, interviews etc on You Tube but for a potted history of a band that really should be better known the ever reliable (well, unless someone's hacked into the thing and rewritten history) Wikipedia's not a bad place to start.