Your idea simply doesn't chime in with anything I know about the nature of modern nation states or how the world works in general. > a series of land purchases

Your idea simply doesn't chime in with anything I know about the nature of modern nation states or how the world works in general. > a series of land purchases made by every country from its bordering neighbours Which nation state would allow for this to happen? The US, which is now trying to build a wall along its Southern border? The Europeans who almost cancelled the Schengen agreement over the wave of refugees? Australia that houses refugees on an island prison[1]? Nobody would sell their land to foreigners. No nation state would give up resources out of humanitarian concern. > The people affected would be resettling in newly-developed cities within newly-purchased territory of their own country Who would even pay for this? We're talking about tens of trillions of dollars. [1] https://en.wikipedia.org/wiki/Australian_immigration_detention_facilities https://en.wikipedia.org/wiki/Australian_immigration_detenti...