I thought I would add to this an interesting youtuber I've watched, and the idea of "Arcologies". The claim is that, a (current) skyscraper sized building that

I thought I would add to this an interesting youtuber I've watched, and the idea of "Arcologies". The claim is that, a (current) skyscraper sized building that is a self sufficient ecology of human living space / food production, poking out one every few square miles, could support dozens of times our current earth's population and that heat, not space, is the real bottleneck for further growth[1]. Has some estimate calculations to back it up. [1] https://www.youtube.com/watch?v=TqKQ94DtS54&t=2s https://www.youtube.com/watch?v=TqKQ94DtS54&t=2s