Robert Craig explores the history of American left-wing Christians who discovered the convergence between radical politics and Christian faith. He examines the life histories of individuals, movements, and organizations that encompass more than a century of American history, and discusses the role of religious activism in movements of social transformation. Craig describes the activists who participated in this (largely ignored) alternative tradition of social action on behalf of the poor. Among those included are Jesse H. Jones, Edward H. Rogers, the Christian Labour Union, and the Knights of labour, which represented workers; Frances Willard and Mother Jones, who worked to improve the status of women and working-class people; Reverdy Ransom, W.E.B. Du Bois, Hubert Harrison, and George Washington Woodbey, who wrestled with the relationship between race and class; Southern radicals, such as Howard Kester, Claude Williams, and the southern Tenant Farmers' Union, which struggled for radical equality; and those involved in the politics of non-violence, such as Dorothy Day and A.J. Muste. Robert H. Craig is Associate Professor of Religion and Philosophy at Mount Union College, Ohio.