What is the Ku Klux Klan?

During the latter 1920s, the Ku Klux Klan is a national fraternal organization promoting moral regeneration and purity, as well as virulent racist, anti-Jewish, anti-Catholic and anti-immigrant values. Organized as a profit-making venture, it spreads rapidly throughout the United States. Eventually it collapses amidst scandal and criminality. Note that various other organizations, not referred to by the book, have used the same name.