collapse of the old society

Tldr: 3-6 ft of sea level rise is inevitable, which will result in at least 230 million climate refugees fleeing coastal areas around the world. At this point the Greenland and West Antarctic ice sheets are almost guaranteed to collapse, which will result in 40 ft of sea level rise and more than a billion climate refugees. And the only thing cutting carbon admissions now will do is slow the rate at which the world warms and give these refugees more time to escape the coasts.

Slowing that rate is still worth doing. And there's still hope to limit the damage. But what a wonderful world we've bequeathed to our children, huh?