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this post was submitted on 22 Aug 2026
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That article's over 20 years old—I'm not up on the latest findings, but I know there's been major work since then on both the peopling of the Americas and on the importance of genetic diversity.
Along with other bottlenecks once thought to be humans on the brink of extinction, like with the Toba eruption, further research tends to find other evidence to reverse the extreme nature speculated on. We do on the other hand have evidence of other species that had bottlenecks caused from disasters and the genetic signs are very obvious. Cheetahs as an example.
It's the other way around. It was once believed that a population of hundreds were needed but the DNA evidence proved it to be much smaller. If you have newer information that shows the DNA work done was wrong, please post it because I've been pulling out this trivia for years.
https://en.wikipedia.org/wiki/Genetic_history_of_the_Indigenous_peoples_of_the_Americas
Hmm... the only cited sources in that article for a specific (effective) population size are also over 20 years old—the more recent sources just say it was likely a “small” number.
This article has a lot more detail on the various migration theories, but refrains from any specific size estimates:
https://en.wikipedia.org/wiki/Peopling_of_the_Americas
When research is old without being found wrong, it is more likely to be correct.