Bob Dylan has been described as one of the most influential figures of the 20th century, musically and culturally. Dylan was included in the Time 100: The Most Important People of the Century where he was called "master poet, caustic social critic and intrepid, guiding spirit of the counterculture generation". In 2004, he was ranked number two in Rolling Stone magazine's list of "Greatest Artists of All Time". Dylan biographer Howard Sounes placed him in even more exalted company when he said, "There are giant figures in art who are sublimely good—Mozart, Picasso, Frank Lloyd Wright, Shakespeare, Dickens. Dylan ranks alongside these artists."
Initially modelling his style on the songs of Woody Guthrie, and lessons learnt from the blues of Robert Johnson, Dylan added increasingly sophisticated lyrical techniques to the folk music of the early 60s, infusing it "with the intellectualism of classic literature and poetry". Paul Simon suggested that Dylan's early compositions virtually took over the folk genre: "[Dylan's] early songs were very rich ... with strong melodies. "Blowin' in the Wind" has a really strong melody. He so enlarged himself through the folk background that he incorporated it for a while. He defined the genre for a while."
When Dylan made his move from acoustic music to a rock backing, the mix became more complex. For many critics, Dylan's greatest achievement was the cultural synthesis exemplified by his mid-'60s trilogy of albums—Bringing It All Back Home, Highway 61 Revisited and Blonde on Blonde. In Mike Marqusee's words: "Between late 1964 and the summer of 1966, Dylan created a body of work that remains unique. Drawing on folk, blues, country, R&B, rock'n'roll, gospel, British beat, symbolist, modernist and Beat poetry, surrealism and Dada, advertising jargon and social commentary, Fellini and Mad magazine, he forged a coherent and original artistic voice and vision. The beauty of these albums retains the power to shock and console."
One legacy of Dylan’s verbal sophistication was the increasing attention paid by literary critics to his lyrics. Professor Christopher Ricks published a 500 page analysis of Dylan’s work, placing him in the context of Eliot, Keats and Tennyson, and claiming that Dylan was a poet worthy of the same close and painstaking analysis. The poet laureate of Great Britain, Andrew Motion, argued that Bob Dylan’s lyrics should be studied in schools. Dylan has been nominated several times for the Nobel Prize in Literature.
Dylan’s voice was, in some ways, as startling as his lyrics. New York Times critic Robert Shelton described Dylan's early vocal style as "a rusty voice suggesting Guthrie's old performances, etched in gravel like Dave Van Ronk's."When the young Bobby Womack told Sam Cooke he didn’t understand Dylan’s vocal style, Cooke explained that: “from now on, it's not going to be about how pretty the voice is. It's going to be about believing that the voice is telling the truth.” Rolling Stone magazine ranked Dylan at number seven in their 2008 listing of “The 100 Greatest Singers of All Time”. Bono commented that “Dylan has tried out so many personas in his singing because it is the way he inhabits his subject matter.”
Dylan's influence has been felt in several musical genres. As Edna Gundersen stated in USA Today: "Dylan's musical DNA has informed nearly every simple twist of pop since 1962." Many musicians have testified to Dylan's influence, such as Joe Strummer, who praised Dylan as having "laid down the template for lyric, tune, seriousness, spirituality, depth of rock music." Other musicians to have acknowledged Dylan's importance include John Lennon, Paul McCartney, Neil Young, Bruce Springsteen, David Bowie, Bryan Ferry, Syd Barrett, Nick Cave, Patti Smith Joni Mitchell,Cat Stevens and Tom Waits.
If Dylan’s legacy in the 1960s was seen as bringing intellectual ambition to popular music, as Dylan advances into his sixties, he is today described as a figure who has greatly expanded the folk culture from which he initially emerged. As J. Hoberman wrote in The Village Voice, "Elvis might never have been born, but someone else would surely have brought the world rock 'n' roll. No such logic accounts for Bob Dylan. No iron law of history demanded that a would-be Elvis from Hibbing, Minnesota, would swerve through the Greenwich Village folk revival to become the world's first and greatest rock 'n' roll beatnik bard and then—having achieved fame and adoration beyond reckoning—vanish into a folk tradition of his own making."