20. "Blowin' in the Wind" (1963)
The song that first branded Dylan a prophet asks nine questions and answers none. Dylan claimed it took only 10 minutes to knock out this meditation on humanity's inhumanity, a rewrite of the anti-slavery spiritual "No More Auction Block." The version most people heard in 1963 wasn't Dylan's – it was Peter, Paul and Mary's cover, which hit Number Two on the pop chart. But in any version, the words are so simple, it sounds like they're handed down from the sky on stone tablets. "It's absolutely wonderful writing," says Merle Haggard. "It was timely then and is still timely today."