This addition to Westminster John Knox Press's Library of Theological Ethics series brings one of Reinhold Niebuhr's classic works back into print. This 1935 book answered some of the theological questions raised by Moral Man and Immoral Society (1932) and articulated for the first time Niebuhr's theological position on many issues. The introduction by ethicist Edmund N. Santurri sets the work into historical and theological context and also assesses the viability of some of Niebuhr's positions for theology and ethics today.