No prominent European socialist before World War I resembled Lenin more closely than Benito Mussolini. Like Lenin, he headed the antirevisionist wing… - Richard Pipes

Stoicism’s contribution to the shaping of the Western intellectual tradition is probably second only to that of Jewish monotheism. If monotheism advanced the revolutionary concept of an all-powerful and all-pervasive but non-material God ruling the universe, the theory of Natural Law posited that God’s universe was rational and capable of being grasped by human intelligence.

[T]he view that anti-Communism equals Fascism remained obligatory in countries subject to Communist censorship until the advent of Mikhail Gorbachev’s glasnost. It was prevalent also in foreign ‘progressive’ circles. Western scholars who had the temerity to link Mussolini or Hitler with Communism in any way or to depict their regimes as genuine mass movements risked verbal or other forms of harassment.

A theoretical defense of private property as a feature of Natural Law, however, was not fully made until the sixteenth and seventeenth centuries, the age of Jean Bodin and Hugo Grotius. But that the idea occurred to Romans is evident from Cicero’s argument that government could not interfere with private property because it had been created in order to protect it.