Hey, I get where you're coming from, but some of those stats aren't quite right. Let me break it down:
Yeah, the population numbers for Africa and South Asia seem about right. But saying 37.5% of people live in extreme poverty? That's way off. The World Bank says it's actually around 9.2% as of 2020. Still a lot of people, but nowhere near a third of the world.
And about birth rates in Africa - it's not 8 kids per woman like you said. It's more like 4.6 on average. Still higher than rich countries, but it's been going down over time.
The thing is, this isn't some age-old pattern that's been happening for thousands of years. Birth rates have been dropping pretty much everywhere as education and healthcare get better, even in poorer countries.
It's important to get the facts straight. There's usually more to the story than what we might assume at first glance.