The Sinful Dwarf
Midfield
As usual this would have been multi-factorial rather than just one thing resulting in a new movement or type of music. As others have mentioned it was as much a reaction to the prevailing political situation, and in particular unemployment, as it was to a reaction against musical trends of the time. Though somewhat ill-defined 'punk rock' music quickly became somewhat generic, thus diluting any effect it may have had, though others moved quickly from the '3-chord' angry polemics. Some took the inspiration of the DIY ethos to progress in areas other than music, and even in music there were a disparate range of styles (the Buzzcocks and the Upstarts for example were very different beasts).