Indiana had the largest and most politically significant state organization in the massive national Ku Klux Klan movement of the 1920s. Using a unique set of Klan membership documents, quantitative analysis, and a variety of other sources, Leonard Moore provides the first comprehensive analysis of the social characteristics and activities of the Indiana Klan membership and thereby reveals the nature of the group's political support.

Challenging traditional assumptions about the Klan, Moore argues that in Indiana the organization represented an extraordinarily wide cross section of...