Wikipedia has some insight into this: https://en.wikipedia.org/wiki/Projections_of_population_growth#History_of_population_projections https://en.wikipedia.org/

Wikipedia has some insight into this: https://en.wikipedia.org/wiki/Projections_of_population_growth#History_of_population_projections https://en.wikipedia.org/wiki/Projections_of_population_grow... My impression is that demographers have thought we would plateau around 9 or so billion.