“In Niebuhr’s hands, the myth of the Fall from the Garden of Eden and the doctrine of original sin were enduring insights about the imperfectability of mankind. Unlike Marxism, liberalism, and fascism, ‘prophetic Christianity’ contained internal checks on utopian aspirations. And yet, Niebuhr believed that even as man was fundamentally flawed, he was ‘called’ to seek justice – not in the hereafter, but in the temporal world.”