This is unfortunately not a joke. It blows my mind that many people today don't understand that communism can only work in a primitive society (the "pure" form that many dream about) or it inevitably leads to an authoritarian dictatorship (in more advanced societies).
(I wouldn't lump "socialism" in there because it's more vague; social-democracy can and does work).
(I wouldn't lump "socialism" in there because it's more vague; social-democracy can and does work).