There was, however, an important difference between Reinhold Niebuhr and Martin Luther King Jr. that partly accounts for why King became a martyr in the civil rights movement while Niebuhr remained safely confined in his office at Union Seminary teaching Christian social ethics, never risking his life in the fight for justice. Unlike King, Niebuhr viewed agape love, as revealed in Jesus’ cross, as an unrealizable goal in history—a state of perfection which no individual or group in society could ever fully hope to achieve. For Niebuhr, Jesus’ cross was an absolute transcendent standard that
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