Book excerpt: In this thinker's guide to rock and roll, Robert Pattison contends that rock music mirrors the tradition of 19th-century Romanticism. The music is vulgar, he notes, and vulgarity is something that high culture has long despised but rarely bothered to define. This book is the first effort since John Ruskin and Aldous Huxley to describe in depth what vulgarity is, and how, with the help of ideas inherent in Romanticism, it has slipped the constraints imposed on it by refined culture and established its own loud arts.