We're often told that the United States is, was, and always has been a Christian nation. But in , historian Kevin M. Kruse reveals that the belief that America is fundamentally and formally Christian originated in the 1930s. To fight the "slavery" of FDR's New Deal, businessmen enlisted religious activists in a campaign for "freedom under God" that culminated in the election of their ally Dwight Eisenhower in 1952. The new president revolutionized the role of religion in American politics. He inaugurated new traditions like the National Prayer Breakfast, as Congress added the phrase "under God" to the Pledge of Allegiance and made "In God We Trust" the country's first official motto. Church membership soon soared to an all-time high of 69 percent. Americans across the religious and political spectrum agreed that their country was "one nation under God." Provocative and authoritative, reveals how an unholy alliance of money, religion, and politics created a false origin story that continues to define and divide American politics to this day.