Want to argue with a mathematical model? This isn't malthus, it's just simple population equations. Plug in current rates and rate of rate change and the number falls out. It's math, not famine, pestilence, disease, and war. Just math.
I don't agree with the model.
Far too many assumptions and far too many extrapolations. As an engineer, I understand the dangers of going beyond current knowledge and applying regional coefficients beyond that region.
Simply wrong. Now, the magnitude of how wrong it is might be worth discussion...