Now, along comes Ryszard Legutko, a Polish professor of philosophy and leading politician, with a better answer. His book, translated by Teresa Adelson, “The Demon in Democracy: Totalitarian Temptations in Free Societies” (Encounter), methodically shows the surprising but substantial similarities between Soviet-style communism and modern liberalism as defined by Sweden or the European Union or Barack Obama. First, the ideologues retreat into fantasy which they fervently try to impose on unwilling subjects. Communists make colossal efforts to convince their vassals that they prosper far more than those wretches living in capitalist countries; liberals turn two genders into 71 or make...