Not only is rock music dead, it’s been dead for quite a while. Like the jazz, blues, and classical genres, it rests now in an afterlife of soundtracks and in the tombs of dark clubs and gilded concert halls, where the remnant priesthood still perform the ancient rituals. But it has no thriving existence. Rock is a form of music distinct from, but closely related to, the earlier doo-wop, rockabilly, and rock ‘n roll. It draws inspiration from the same genres of jazz, blues, gospel, country, and the folk music of the British Isles transplanted to the American backwoods. It...