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The annual meeting of the World Economic Forum, in Davos, Switzerland, was well under way when it officially commenced, early on a Wednesday evening in January, with an address, in the Congress Hall of the Congress Center, by Angela Merkel, the Chancellor of Germany. She had a lot to say about Europe. Some of it—“Do we dare more Europe? Yes, we do dare”—made the news. But outside the hall many Davos participants paid her no mind. They loitered in various lounges carrying on conversations with each other. They talked and talked—as though they hadn’t been talking all day. They had talked while sitting on panels or while skipping panels that others were sitting on. “Historic Complexity: How Did We Get Here?,” “The Compensation...