Teenagers didn't always exist. They had to be invented. As the cultural landscape around the world was thrown into turmoil during the industrial revolution, the concept of a new generation took shape. Whether in America, England, or Germany, whether party-crazed Flappers or hip Swing Kids, zealous Nazi Youth or frenzied Sub-Debs, it didn't matter - this was a new idea of youth. Documentary by Matt Wolf based on John Savage’s book "Teenage: The Creation of Youth Culture."