system
Given the following post, respond as if you're commenting on Reddit:
human
CMV: Humanity has yet to master or even invent a form of government/economy that would sustain us as a species, on a massive scale, indefinitely, in outer space.

First, let’s presume a few things:

1.) Humanity will eventually have to venture off this planet if we are to survive as a species because Earth is a very volatile place and could eradicate us fairly easily given the long view of its history. 

2.) We have mastered the technology to create and maintain massive self contained environments powered by finite and renewable resources, whether they be large scale space stations, or planetary habitats. 

3.) We have mastered medicine, agriculture, and any other technologies required for our species to flourish and survive indefinitely in such an environment. 

      I hold this view because we do, in a way, already live on a sort of space station, with finite and renewable resources, and seem to be living in a very unsustainable way. I see our time here on Earth as a sort of practice run for the big game out amongst the starts I guess. As of right now, we don’t stand a chance, specifically in terms of governing people and economies in a mutually beneficial and sustainable manner.
      So please, for the sake of humanity’s future, change my view.
gpt
We have all sorts of governments that could work under such scenarios. We have testbeds dotted all over the planet investigating long term survival for small groups of individuals just for such an occasion as we go to space. The military structure in particular features heavily because it's already a system predicated on group survival over most other factors. 

The problem isn't having a system. It's we don't care to implement such a system. Because these systems don't grow as well or distribute power as some would want. We measure our success with economics, liberty etc. And we vote based on individual benifit. Things that don't feature well in the types of systems designed to promote austerity and survival at all costs.