One billion, one continentgemini://zaibatsu.circumlunar.space/~solderpunk/gemlog/one-billion-one-continent.gmi
Solderpunk came up with a different way of portraying the future of humanity in sci-fi. Slowly move everybody to one continent. Most people live in 50 megacities. We live and degrowth as long as we can. A fun concept. I myself like space conquering more, to be honest. Maybe combine the two?