communism hasn't been tried, we tried socialism, but communism needs a prosperous period of capitalism to occour first (splitting up a rich country betweeen the people, is much better than splitting up a poor country). If a rich society tried communism they would have a much better chance of success; If they used robots to do the jobs people don't want to, i think they have an excellent chance. I heard a chineese empror tried to get the moon and i didn't work, then the US failed multiple times, but that dosn't mean it wasn't possible.