Moral Man and Immoral Society: A Study in Ethics and Politics is a 1932 book by Reinhold Niebuhr, a Protestant theologian at Union Theological Seminary (UTS) in New York City, New York, United States. The thesis of the book is that people are likelier to sin as members of groups than as individuals. Niebuhr wrote the book in a single summer. He drew the book's contents from his experiences as a pastor in Detroit, Michigan prior to his professorship at UTS. The book attacks liberalism, both secular and religious, and is particularly critical of John Dewey and the Social Gospel. Moral Man and Immoral Society generated much controversy and raised Niebuhr's public profile significantly. Initial reception of the book by liberal Christian critics was negative, but its reputation soon improved as