Reinhold Niebuhr is renowned for his unflinching honesty concerning issues of social ethics-specifically, love and justice. His influence is great both inside and outside the Christian church. Human beings, Niebuhr says, are incapable of perfect love. Therefore their struggle against evil and in- justice is doomed to only relative victory, although they strive to live in the ideal world. Niebuhr's concern with this paradox led to numerous writings over the years in which he explored the many angles and subtleties, heights and depths of the problems of humanity and society. Sixty-four of these important pieces are compiled here in a single volume, providing evidence of Niebuhr's belief that positive decisions and actions are possible for Christians. These articles summarize some of the most fruitful viewpoints in modern theological history.