I know I keep repeating myself, but I thought Karl Popper's Open Society and Its Enemies, Volume II had an interesting dicussion of the flaws of capitalism and the motivations behind communism and fascism, in the run-up to World War II. You may think WWII is ancient history, but it was a decisive moment for these ideologies, and the prelude to the Cold War.

For lighter reading, anything by George Orwell, especially Animal Farm.

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"A witty saying proves nothing" Voltaire.
"All your bias are belong to us" Ara Pacis.