Like you said, what remains may no longer be as we know it, but then again humanity has gone through so many paradigm shifts (and the shifts are accelerating due to technology) that it would be surprising if civilization was the same 50-100 years from now.
I’m sorry, but a PDF from 1980 isn’t exactly a reliable source of information about the future. It’s a little scary how people think this is a real possibility.
If not science, what do you suggest people use to predict the future?
Anyway, here’s a more modern source. It was peer reviewed, and is considered up to date and also reliable:
https://projects.propublica.org/climate-migration/
I suggest reading it, but if you scroll halfway down, you can type in a county, and it’ll provide more detailed predictions. I suggest checking it against recent news. You’ll find that the areas it predicts will soon be uninhabitable are already showing signs of ecosystem collapse. (Especially the US southwest)
Again, civilization is not going to collapse in the 2060s because an academic research paper says so.
https://mk0insideclimats3pe4.kinstacdn.com/wp-content/upload...
(Page 14)
So, this human civilization is on schedule to collapse in about 50 years.
Of course, science in this matter has improved since 1980, but I like that report because it correctly predicted the current state of things 40 years ago. Also, it was written by the big oil companies. It’s difficult to argue they were being intentionally alarmist or had the science wrong.