“Fascism itself was a variant of Sorelian syndicalism which advertized itself as voluntaristic, neo-idealist and elitist socialism. This current of socialist thought neither Fascism nor Gentile ever rejected. ‘Fascism,’ Gentile insisted, ‘as a consequence of its Marxian and Sorelian patrimony . . . conjoined with the influence of contemporary Italian idealism, through which Fascist thought attained maturity, conceives philosophy as praxis.’”