It was the revolutionary syndicalists, those dissidents and nonconformists of the Left, who by means of their criticism of Marxist determinism create… - Zeev Sternhell

Thus, it was quite natural that a synthesis would arise between this new socialism [fascism], which discovered the nation as a revolutionary agent, and the nationalist movement, which also rebelled against the old world of conservatives, against the aristocrats and the bourgeois, and against social injustices and which believed that the nation would never be complete until it had integrated the proletariat. A socialism for the whole collectivity and a nationalism that, severed from conservatism, proclaimed itself as being by definition the messenger of unity and unanimity thus came together to form an unprecedented weapon of war against the bourgeois order and liberal democracy.

The nascent Fascist ideology derived its initial basic content from the syndicalist-nationalist synthesis. This synthesis would not have been possible without the original contribution of Sorel, Sorel who had preached hatred for the heritage of the eighteenth century, for Voltaire and Rousseau, for the French Revolution, for rationalism and optimism, for liberal democracy and bourgeois society;…

At the same time as Sorel, the revolutionary syndicalists in Italy came to this conclusion: they threw themselves enthusiastically into the war not out of patriotism, as is often thought, but because they saw it as an instrument of revolution. Since war is a conflict between nations rather than between classes, the nation was seen as the foremost agent of revolution, and Italian revolutionary syndicalism became the backbone of fascist ideology.