The Right of the Protestant Left explores the centrality of religious realignment for the development of American and global politics through the story of the 'Christian Realists' who led the American Protestant left after World War I. As a public theological community with transnational ties, the Realists attacked modern civilization, preached participatory democratic relations, and called for an ecumenical world Protestantism. Ultimately, in religion as well as in politics, the Realists and their associates at home and abroad proved to be the authentic religious right of their era. This valuable study thus highlights the conservative strain latent within twentieth-century American liberalism.