You might find it interesting to read up on other things by the late Hans Rosling e.g. https://www.google.ch/amp/s/www.bbc.com/news/amp/world-39211... - one of his key arguments is the Wests beliefs about 3rd world population growth are largely outdated and lack awareness of how much progress has been made.
He has a lot of good videos out there but this is the one specifically covering Africa / population predictions and the misconceptions / dated knowledge.