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BenK's avatar

Arnold;

Allow me to introduce some expert knowledge which might change your perspective on the Khan statement:

Starting with a general-purpose article:

https://pulitzercenter.org/stories/how-worlds-deadliest-crises-go-unseen

This article obeys the first rule of author intent - the author pays attention to something which reinforces his perspective. However, it points to something interesting. The only places in the world with robust, even scary (from some perspectives), population growth rates are those places with little to no reliable vital statistics.

https://onlinelibrary.wiley.com/doi/10.1111/padr.12608

https://www.demographic-research.org/volumes/vol50/38/50-38.pdf

https://www.thelancet.com/journals/langlo/article/PIIS2214-109X(24)00171-2/fulltext

https://www.demographic-research.org/articles/volume/49/31

The simple fact is that we can't know much about the birth and death rates in large parts of Africa. People draw shocking conclusions and fit them to all sorts of ideologies. My expectation is that a world-wide trend doesn't skip places with bad statistics; and that local leaders tend to overestimate populations, hide deaths, etc for a variety of reasons, and that old data is also poor, but reflected assumptions about exponential, runaway human population - soaring through Malthusian limits - that motivated all sorts of interventions. In every other region, the annual ritual is that population projections are lowered repeatedly. If the surprise is always in the same direction, it should not be a surprise anymore. I expect rapidly falling fertility and soon falling population in Africa and rural India.

I'm not sure what the population composition will be world-wide or locally in the future, but I doubt that analysis of faked statistics will be a good guide.

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John Alcorn's avatar

Technology shock — the pill, new abortion techniques, transition to a service economy — probably has been a major cause of marriage delay and birth-rate decline. Maybe future technology shocks will increase the birth-rate? "Designer babies" and artificial wombs come to mind.

Or maybe I'm barking up the wrong tree. Arnold seems to count on selection effects and heritability of fertility genes. Robin Hanson seems to put hope in exponential growth of Amish and other insular high-fertility cultures.

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