I don't know what to tell you about reducing this problem to an online survey and hoping for the best. There are people doing actual science --- including with modern IQ tests --- working on these problems. I think the bigger thing here is that, outside of message boards and Twitter, there just aren't that many people interested in a global country-by-country inventory of "average IQ".
> there just aren't that many people interested in a global country-by-country inventory of "average IQ".
Thats also a fair theory to explain the lack of real data. Given the frequency with which I've had similar conversations it feels off to me, but that may just be my bias.
It certainly seems to be a very interesting problem to researchers. Thirty years later it is still cited frequently enough that Elsevier is having to hunt and destroy papers that cite it.
https://www.theguardian.com/science/2024/dec/10/elsevier-rev...