Of all the early breakthrough rock & roll artists, none was more important to the development of the music than Chuck Berry. He was its greatest songwriter, the main shaper of its instrumental voice, one of its greatest guitarists, and one of its greatest performers. Quite simply, without him there would be no Beatles, Rolling Stones, Beach Boys, Bob Dylan, nor myriad others. There would be no standard "Chuck Berry guitar intro," the instrument's clarion call to get the joint rockin' in any setting. The clippety-clop rhythms of rockabilly would not have been mainstreamed into ...