As long as we refuse to acknowledge the madness of the religious wars and persecutions of the 16th century, he argues, we remain in danger of loosening our grip on "the Great Separation" (of church and state) that resulted from it. By not understanding how easily any politics infused with any religion can drift in the direction of fanaticism and terror, we put ourselves at risk of drifting that way ourselves.
If we think the West is way beyond lapsing into that kind of insanity, Lilla (a professor of the humanities at Columbia University and frequent contributor to the New York Review of Books) begs to differ. "Intellectual complacency," he writes, "nursed by an implicit faith in the inevitability of secularization, has blinded us to the persistence of political theology and its manifest power to shape human life at any moment." Political theology, what Lilla defines as "discourse about political authority based on a revealed divine nexus," takes its beliefs about how society should be run and how power should be distributed from what it considers to be the word of God -- the divine truth revealed to man through scripture.