The host and co-creator of Studio 360 discusses his new book, Fantasyland: How America Went Haywire, a 500-Year History. He spoke with NYU professor Kwame Anthony Appiah. Andersen argues that the roots of our post-truth, alternative facts present can be discovered in America's "promiscuous devotion to the untrue" and its instinct to believe in make believe, evident across four centuries of magical thinkers and true believers, hucksters and suckers, who have embedded an appetite for believe-whatever-you-want fantasy into our national DNA.