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Don't know about 'changing the world', but it is one of my favorite songs! Don't know why, really. I like the electric organ parts of it.
The doctor who discovered penicillin changed the world. The doctor who discovered the polio vaccine changed the world. The guys who won WWII changed the world. Bob Dylan is just a musician and until the 20th century performers were considered to be only slightly more respectable than prostitutes. Perhaps we should go back to that.