There are few symbols of pure Americana more potent than the Disney theme parks. To walk down any of the destinations’ manicured Main Streets, U.S.A.—as hundreds of thousands of visitors do each day—is to walk though a particular vision of America’s collective memory. It’s small-town values. It’s optimism. It’s energy. It’s innovation. It’s a certain kind of innocence. It is by design, the story of the “American Way”—and one that has played a dominant role in shaping the collective memory …