Born of oppression and built upon improvisation, jazz music transcends racial divisions and evolves with the times. Originating in New Orleans, jazz migrated north during the Roaring Twenties, ignited by the Hot Jazz of Louis Armstrong and the cool tunes of Duke Ellington. In 450 entries, American Popular Music: Jazz follows the history and development of jazz through the years, monitoring a genre in musical history that remains vital and dynamic to American popular culture as we know it.