[throwawaymath]

I'm glad you actually cited something, because online discussions of IQ tend to be ridiculously fraught with baseless speculation and poorly substantiated opinions. Thanks for the link, will have to dig into it.

As a counterpoint, there are a few meta-surveys which suggest that individuals with higher IQs generally have better[1] long term outcomes. I emphasize individual here because your source appears to be analyzing it at the level of economic productivity and industrial output at the national level (but correct me if I'm wrong).

Here are a few sources I've read, which have been aggregated (with light commentary) by gwern:

1. https://www.gwern.net/Hunter

2. https://www.gwern.net/iq

3. https://www.gwern.net/Iodine

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1. This is weaselly, but "better" is difficult to define in a message board comment.