Pardon the self-promotion: I reviewed a new book on Reinhold Niebuhr, a theologian and realist political thinker during the Cold War, in last week’s Economist. Niebuhr died in the 1970’s but both Democrats and Republicans lean on his advice (even if misread) to guide their modern foreign policy views. Here is a snippet from my review of the book, Why Niebuhr Now?, by John Patrick Diggins, the late American intellectual historian. AFTER years in the doldrums, Reinhold Niebuhr, an American theologian, is enjoying a comeback. Although Niebuhr died in 1971, he is nowadays often name-dropped in opinion columns and highbrow …

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