[notadoc]

Interesting way to look at it, I have never met anyone with that particular way of thinking about children.

Most people I know made decisions about having children in terms of resources. Mainly, about available time and/or money.

[kaycebasques]

I don’t see these two ideas as at odds with each other. Maybe people aren’t explicitly calculating that they should reduce the population, but deciding not to have children because of lack of resources seems like a subconscious vote to reduce the population, in my view.

[Fnoord]

There's another option besides "not having children": "having less children."