The role of liberalized, ecumenical Protestantism in American history has too often been obscured by the more flamboyant and orthodox versions of the faith that oppose evolution, embrace narrow conceptions of family values, and continue to insist that the United States should be understood as a Christian nation. This book examines how liberal Protestant thinkers struggled to embrace modernity, even at the cost of yielding much of the symbolic capital of Christianity to more conservative, evangelical communities of faith. If religion is not simply a private concern, but a potential basis for public policy and a national culture, does this mean that religious ideas can be subject to the same kind of robust public debate normally given to ideas about race, gender, and the economy? Or is there something special about religious ideas that invite a suspension of critical discussion? These essays, collected here for the first time, demonstrate that the critical discussion of religious ideas has been central to the process by which Protestantism has been liberalized throughout the history of the United States, and shed light on the complex relationship between religion and politics in contemporary American life. The book brings together in one volume the author's most influential writings on ecumenical Protestantism. It features an informative general introduction as well as concise introductions to each essay.