Anything that introduces friction for both high and low IQ is right out as friction will increase user base entropy. You ideally want a one time cost. Blind, a kind of 4chan for software engineers, works for tech, as you need a corporate email to get in. Lobste.rs deals with this problem by being invite only.
Your posts are the main thing bringing me back to the site. Too bad you didn't drop your new twitter/substack.
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This is coarse, and based on racism. The nuanced argument is that IQ is > 50% determined by genetics, and that distributions between groups differ. Notably, these groups need not correspond exactly, or at all to races. Not all Jewish groups have a 15 IQ advantage, it's the Ashkenazi. Big rich cities in big countries select for IQ, Indians in the US are a self selected subgroup, etc.
The ethnic group with the highest average IQ is, as far as I know, the Ashkenazi Jews. If the theory that intelligence was mainly driven by social competition holds, I'd guess smarts and neotony would be selected for by similar pressures.
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