James H. Madison, the Thomas and Kathryn Miller Professor of History Emeritus at Indiana University, offers new knowledge about a significant organization in Indiana’s history. He explains the Klan’s popularity during the 1920’s and the goals of the many native-born, white Protestants who joined. He expands the story by focusing also on those Hoosiers the Klan judged less than 100% American, including African Americans and Jews, and the Klan’s primary enemies, Catholics and immigrants. Jim Madison also spotlights those courageous Hoosiers who stood up to the Klan and eventually brought its downfall.