Ever been to Seoul? I have. People live there pretty well.
It's crowded, yes. But the landmass of the earth is very very large. And most of it is empty for miles. Hundreds and thousands of miles.
I take it you don't like math.
The earth and all that was on it was given to us to husband and steward. If we do that well, terra could support over 100 times the population we have now.
Be fruitful. Multiply.
/johnny
And the remaining land was left to farming, ranching, resource development and millions of acres of wildlife refuge.
If the Africans and the Indians are too damned poor to look after their lions and tigers and elephants, then why can't we?
And the liberals stupid enough to go into the refuge without the proper armaments would be duly recycled into the environment.
Win win.
That's only 40 people per acre. You could easily build small apartment buildings or condos to hold 40 on an acre with room to spare. Or put 80 per acre and leave an acre lot between, checkerboard style.