Book excerpt: "In this exceptional dual biography and cultural history, Erik S. Gellman and Jarod Roll trace the influence of two southern activist preachers, one black and one white, who used their ministry to organize the working class in the 1930s and 1940s across lines of gender, race, and geography. Owen Whitfield and Claude Williams drew on their bedrock religious beliefs to stir ordinary men and women to demand social and economic justice in the eras of the Great Depression, New Deal, and Second World War." -- Book cover.