Re: A small point
<If we make space easily accessable, there will not be a population problem.
Averaged over the total inhabited volume, maybe... down at the bottom of this gravity well, however, "the rich get richer and the poor have babies".
Space is going to have to be very easily accessible - that is, practically free of launch cost to emigrants or their sponsors, with unlimited carrying capacity and extra-terran infrastructure well underway - to even contemplate reducing Earth's population by relocation.
Fox (not wanting to be a wet blanket, but...)