The Clash ARE the greatest rock band ever, every album was a TOTALLY different concept,......name a musical genre, and the clash have had a stab at it, and in doing so, were still recognisible as themselves....instances are too numerous to mention them all here, but have a REAL gander at ALL their work, and see how they developed as musicians, songwriters,AND politically.
I recommend that you have a swatch at SUPERBLACKMARKETCLASH,.........20 odd years later, the dancetracks would hold up on the dancefloor of any present day "club"............major respect to THE CLASH the band, and to the late Joe Strummer,...THE MAN!