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Q&A | God Is Back authors say Christianity is poised to do well—and better than Islam—in the 21st century | Marvin Olasky

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Scottish poet Robert Burns wrote of the great gift we sometimes have of being able to see ourselves as others see us. John Micklethwait and Adrian Wooldridge are editor-in-chief and Washington bureau chief of The Economist, the best secular newsweekly in the world. Their new book, God Is Back, details the findings that surprised them as they assessed the state of Christianity in America and religion throughout the world.

What were you trying to find out as you did the reporting for God Is Back?

John Micklethwait: Whether the secularization theory taught to us in elite universities—the idea that the more modern the world gets, the more secular it is—is true.

And you found out . . .