Advisors: Brian May.Committee members: David Gorman; Amy Newman.Includes bibliographical references.This thesis discusses Stephen Sondheim's 1979 musical adaptation of the novel that originated the story of Sweeney Todd in 1846, The String of Pearls. Sondheim's musical has been lastingly popular with its American audience despite the story's British roots, due in large part to the American innovation of the tale. Sondheim's Americanization emphasizes several themes, already staples of American culture as evidenced by trends in popular cultural artifacts such as Batman, which speak to American audiences and allow them to connect with the British story of Sweeney Todd. In Sondheim's transformation, the villainous Sweeney Todd becomes a comple...