What you say is entirely correct: in 2120 there will, proportionally, be more people living in northern latitudes. It nimbly skips over what will happen to get

What you say is entirely correct: in 2120 there will, proportionally, be more people living in northern latitudes. It nimbly skips over what will happen to get them there. India is the second most populated country in the world. Pakistan is fifth. Between them, they need to move hundreds of millions of people before the end of the century. Directly north of them are China and Russia. China and Russia both have very restrictive immigration policies, and are one-party authoritarian states. All four of these countries have nuclear weapons.