system
A chat on subreddit /r/NoStupidQuestions
human
There has never been a case of a communist society not being interfered with by a capitalist or authoritarian force, so your question is a little silly :P

It's like the people that believe humans are naturally competitive.  Well we don't know that for sure.  Sure every modern society seems competitive, but there's plenty of evidence of cooperative societies through out human history.  The problem is, every single cooperative society was either wiped out or corrupted by a competitive society, so we will never know if humans are naturally cooperative or if a cooperative society would be a better ideal for us because every time we try, a competitive society wipes it out.
gpt
I watched a video recently that was titled something like "why it's hard to imagine a world after capitalism" and your comment was essentially the main argument. Pretty much any time that we've tried, capitalism has come in and tried to undo the efforts for the sake of capitalism remaining strong.