In 1982, a 40-year-old insurance salesman who sold policies to professional athletes traveled from his home in Lawrence, Kansas, to New York City on a business trip. Shortly before he left, Bob Swan, Jr.—the father of two young daughters, and a man increasingly concerned about the possibility of a nuclear war between the United States and the Soviet Union—mentioned to his then-wife Jane that he had had a dream about a film that portrayed an American family and a Russian family in the aftermath of nuclear war and “showed the total absurdity” of such a war. While he was in New York, Swan attended a huge march for nuclear disarmament that was life-changing for him. “When I got back from this amazing experience,” Swan told me when I visited him at his home a few months ago, one of the first things his wife said was: “They announced while you were gone, they’re going to make that film you dreamed about. They’re going to film it in Lawrence.”