[mywittyname]

The author's models for population growth are too rudimentary to be accurate over more than one or two decades. I find it really hard to believe that the growth rate for countries will maintain a constant value for the next few centuries.

[ProAm]

Why?

[legodt]

There are near infinite factors influencing birth rate that are all interconnected. No model can accurately account for all of this, but the models linked don't even attempt to cut very deeply.