I think trying to fit the populations of North America, Europe, Russia, China, Japan, Korea, the Stans, Mongolia, the Baltics, New Zealand, Chile, and Argentina

I think trying to fit the populations of North America, Europe, Russia, China, Japan, Korea, the Stans, Mongolia, the Baltics, New Zealand, Chile, and Argentina, not to mention alpine countries like Nepal, into the ideal human habitability zone would go poorly.