With a top heavy population pyramid, more resources have to be diverted to caring for the elderly, therefore less for raising the young - a self reinforcing mechanism.

When actually given the choice, many women are choosing not to have children, for good reasons. E.g. disruption of careers, physical effects on the body, being tied to a partner, financial drain.

Until we face up to both these issues, demographic collapse will continue - humanity will simply evaporate.

According to some people, AI will take most of those jobs anyway, so maybe it all works out in the end :)

.. humanity will be replaced by the subset of it which continues to have children.

If a subgroup actually has children at above replacement, then as the other groups shrink, they will be a larger and larger fraction of the population.

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