From 1910 to the end of World War I, American society witnessed a tremendous outpouring of books, pamphlets, and especially newspapers espousing virulently anti-Catholic themes and calling on readers to recognize the danger of Catholicism to the American republic. By 1915 the most popular anti-Catholic newspaper, The Menace, boasted over 1.6 million weekly readers. Justin Nordstrom's Danger on the Doorstep examines for the first time...