When did those awkward, tormented creatures known as teenagers first crawl out of the primordial ooze and into American culture? Believe it or not, they didn't always exist. It was not until World War II, with grown men off fighting and grown women working in factories, that adolescents were left idle and unsupervised long enough to wreak havoc. In the forties, fifties, and sixties a new breed of youth evolved -- the juvenile delinquent -- and this...