Goldberg has marshaled a staggering amount of evidence to conclude, as the first chapter has it, that "everything you know about fascism is wrong." Mussolini was weaned on anarcho-socialism (his father Alessandro was a socialist and anarchist). Mussolini and the Italian Fascist party were, in the early years, not anti-Semitic—in fact, the party included Jews. As a young man, Mussolini had carried in his pocket a medallion of Karl Marx, whose influence—combined with the bizarre syndicalist philosophy of George Sorel and a Nietzschean contempt for Christianity—resulted in Italian fascism, a mix of myth-making, prophecy about the rise of the working...