Counterpoint: 1) There are population groups which are exponentially growing 2) There are ones which are declining This is not taken into account in models.

Counterpoint: 1) There are population groups which are exponentially growing 2) There are ones which are declining This is not taken into account in models. Economic growth shifts bucket 1 into bucket 2, but genetically-speaking, we favor people who want a lot of kids. The exponential growth groups will eventually overtake the exponential-decline or the plateau groups. For a silly exploration of this phenomenon, see the movie Idiocracy. Trigger warning: This movie is nearing 20 years old, and has a lot of things which might trigger the types of people who expect trigger warnings.