My disagreement was about "a lot of land that you can't reasonably build a city on". I don't doubt your numbers. That said, Tokyo, which is a wonderful city to

My disagreement was about "a lot of land that you can't reasonably build a city on". I don't doubt your numbers. That said, Tokyo, which is a wonderful city to live in, and on more earthquake prone land, has 14 million people on 5,194 square miles: https://en.wikipedia.org/wiki/Tokyo https://en.wikipedia.org/wiki/Tokyo.