2B people spent better part of 20th century doing the experiments, killing tens of millions of those who didn’t completely shared the ideas of the collective, and you think it is premature?
General theory is in the Das Kapital. So far the things have worked as described. People by mistake ascribe happiness to the outcomes calculated there while there is no such happiness predicted by that theory. Ie communism isn’t a happy place like some naïve readers think, communism is prison and oppression.