Hmm. Working and great are very different. And even with working, there are varying degrees of working. Maybe on paper Communism "works", but in practice it's horrible.

Communism meaning the utopian idea of a society where the means of production are owned collectively, without money class or any form of state. 🤔 I can't think of a single example in living memory.

Cuba and Vietnam have achieved socialism.

Obviously Libya was the closest thing to communism in living memory but even Libya was just libertarian socialism.

Technically before agriculture all human societies were communist but that was like 15 thousand years ago.