I am a little cynical when it comes to humans and humanity as a whole, and generally believe that humans will ultimately choose for their own interests over those of others. Therefor, humans without any government would be all after their own interests, and that wouldn't turn out so well. Governments, although run by humans, are ultimately systems, and the systems themselves are not evil, just sometimes the people running them Communism is a great system, but it doesn't take into account the greed and evilness that is hidden deep down in humans (in some rather shallowly) and thus we have seen communistic governments typically oppressive and just flat out bad. Democracy, republics, blah blah all are at the core systems, just like communism, and thus should work perfectly if used by robots, but there are still evil and greedy people. These types of systems, however, just help account for some of the human flaws, and thus we are left with a slightly less-sucky government and society. Humans are evil and greedy, and if left on their own everything will be evil and greedy. Paired with a perfect systematic government, things kinda cancel out and you are left with what we have today, which is horrible, but I would still have governments and society over pure humanity.