The human population of the universe may very well get to 11 billion. Hopefully many more times than that. Hopefully, Governments won't stand in the way when the technology to get off world and live off world is created. I think the technology could be completed in fifteen years if we really wanted it.
One thing about living off world is that we do not know if we can breed out there.
There is good reason some refer to Mother Moon, we humans have adapted to it's cycle over millions of years and were the moon to get knocked out of orbit, life on earth would die out. There would be no tides and the oceans would become cesspools of disease.
This Mars experiment is interesting, Mars has more then one moon and what the effects on the Females and their ability to have children is something we will just have to wait and see until we get there. Pity the Males if the females get their period every other week.
If in fact females can breed what are the effects on the children born to them, will they survive ?? After 3 generations will the New Martians even look like Earth people ? Will they resemble the pictures of eye witnesses to what they believe are space men ??
There is a REASON God put humans on Earth and not Mars or Jupiter, He made us in His image and where ever HE and his Angles came from had to insure that when one of them came to earth they could also exist for a time here, Lucifer seems to have taken up residence shortly after Adam and Eve and has hung out with no ill effects to himself. I wonder if Lucifer will follow humans off Earth and give us on Earth a much needed break from his influence ?
Vagabond, just musing on ramifications of us humans leaving to go places God never intended us to go.