Why is global Fertility rate collapsing at a rate worse than the UN's worse case scenario?

https://www.ft.com/content/3862923c-f7bd-42a8-a9ea-06ebf754bf14?sharetype=gift
Why is global Fertility rate collapsing at a rate worse than the UN's worse case scenario?

https://www.ft.com/content/3862923c-f7bd-42a8-a9ea-06ebf754bf14?sharetype=gift
It isn't.
Most of the "numbers" were based on bullshit invented by academics in need of jobs after the second worlds war. A lot of the current "problems" are mainly due to academic bullshit contrived back in the post war era where they were inventing jobs left and right.
A lot of what was produced back then, would not even be considered valid today. But we are where we are. The numbers are actually being "corrected" from many sources such as prediction models.
Those Graphs show birth rates not fertility rates.
And birth rates go down with the improvement of medicine, such as vaccines, because the mortality rate of kids gets reduced.
Before you had 6 kids and 3~4 died before the age of six, now you have 2 kids and both die of old age.
Individually fertility is a reference to a persons ability to have kids however collectively fertility rates is a reference to how many children people are expected to have.
https://en.wikipedia.org/wiki/Total_fertility_rate
@astarlessnightsky This is almost interchangeable with birth rate as it is taken from that number.
Birth rate and fertility rate are VERY different things. People are fertile, people just can't afford to have children.
I'm afraid your mistaken in regard to how the word fertility is used in reference to populations:
https://en.wikipedia.org/wiki/Total_fertility_rate
They are regardless speaking of what you would call Birth rate and expected birth rate.
First line of that page "Not to be confused with birth rate"
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