The problem has been that once a relatively few people got all that authority, under a socialist or fascist regime, they then never wanted to give it up. So societies never "evolved" beyond that to true communism. Nor is it likely to ever happen. Marx was a loon.
Pure communism is an interesting idea that is unlikely to work with humans in the long run.
It does not follow that "Marx was a loon". Given a society or species that is much more altruistic, willing to contribute to the entire society rather than focusing on personal benefit, the result would be elevation of everybody.
The idea by itself has merit, where all of society is doing all it can to contribute to everyone. But humans are greedy, selfish, lying, power hungry, egoistic creatures. Good idea, just not for humanity.