Is it plausible that humanity goes extinct due to not making enough children? If not, what would make it more plausible?

With the increase in living standards, the number of children by women is decreasing in highly developed countries.

Question: Is it conceivable (with the aggravating factors proposed below) to see this tendency become global in the future, and the population ending up decreasing up to extinction level?

Aggravating factors:
- Humans go live on a range of planets around close stars, thus the population becomes more scattered.
- There is little to no awareness of the matter, nor any propaganda about making more children.

Note: This question can be considered the opposite of:
What should three men and three women do if everyone else is dead?
(but its answers contain interesting information like the minimal number of individuals in order for a population to survive. (e.g. 4169))

posted over 9 years ago

dyarob‭

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