I didn't know this was controversial? The UN numbers referred to show that this is a likely outcome already on page 2. At most the author seems to disagree wit

I didn't know this was controversial? The UN numbers referred to show that this is a likely outcome already on page 2. At most the author seems to disagree with UN about ~1 billion people. Well within the uncertainty. https://population.un.org/wpp/Publications/Files/WPP2017_KeyFindings.pdf https://population.un.org/wpp/Publications/Files/WPP2017_Key...