We should increase population. Why? It will take a lot more geniuses and laborers to help us go to the stars if that's what we want. Fill the earth with people like I said in my previous post, above. And let's make the stars our goal.
Do you remember the dark ages?
That's when the majority of the world believed in a fairy tale, and ALL SCIENTIFIC ADVANCES STOPPED FOr 500 YEARS. If you did science, you were killed in the name of a fairy tale.
We don't need more people on this planet - we need smarter ones. People that believe in fairy tales will eventually be bred out through selective evolution.
People who believe in evolution, but do not believe in God, will be dissolved into their component parts, even though it will take an eternity for this to happen.
Meanwhile, God will support His faithful followers with marvels way beyond anything this universe has to offer.
Will God ever have a big enough population to match his grandeur? Probably not. Probably in the New Earth God is creating, we all will have our chance to start our own universe in some distant future of eternity.
Of course, those who do not like population or God, will die out, and never have the fun of making their own universe.