I think, in all honesty, no song has changed history as such - that is a myth perpetuated by conceited songwriters. However, there are songs which can be considered as groundbreaking in musical terms - songs which changed musical history; songs after which nothing would be the same again. I'm sure you can all think of a few of these, but I'm just suggesting one on which a whole era turned.

So, play it loud & rejoice that it happened at all, for even though it's effectively a cover-vesion of 2 other songs rolled into one (it is, after all, integral to the Living Process of Popular Traditional Musical) how different the world would be now without this song. The year (astonishingly) in 1963...

http://www.youtube.com/watch?v=QXLqMB6vBic