Forecasting the state of modern civilization for generations or centuries to come remains an impossible exercise. Even relatively near-term forecasts are bound to fail: no matter how assiduously assembled, a 2018 construct of the world as it might be in 2100 would be, almost certainly, even more misleading than the construct of the year 2018 made in 1936.
Smil, Vaclav. Growth: From Microorganisms to Megacities. Cambridge, Massachusetts: The MIT Press, 2019.
