Charles Lemert, University Professor and Andrus Professor of Social Theory, emeritus, is the author of Why Niebuhr Matters, published by Yale University Press, November 2011. Reinhold Niebuhr (1892–1971) was a Protestant preacher, an influential religious thinker, and an important moral guide in mid-20th-century America. His work has informed the thinking of political leaders and commentators from Barack Obama and Madeleine Albright to David Brooks and Walter Russell Mead. In this lively overview of Niebuhr's career, Lemert analyzes why interest in Niebuhr is rising and how Niebuhr provides the answers we ache for in the face of seismic shifts in the…