The military can’t take you with an IQ under 83. That’s because they are more ha

The military can’t take you with an IQ under 83.
That’s because they are more harmful than helpful, 1.5-3x more likely to fail training, and 3-9x remedial training, they die at 3x the rate of those with higher IQs.
That 83IQ limit is about 17% of Americans. Just raising it to 85 takes it to 20% of Americans.
The Military can’t tolerate more than 20% of recruits under 92. That’s around 36% of Americans.
Every 15 points of additional IQ means you’re 27% more likely to be alive at age 76.
— From Veritas’ recent video.

Comments:
The correlation between IQ and income is not high; it’s between the complexity of work and income. (AFAIK, conscientiousness correlates with income and net worth).

Does IQ matter? Yes. A lot.

But is the test always measuring the same thing? Well, in a western country, yes, because we’ve neutralized the flynn effect. In less developed countries? Well, we should expect average IQs to increase over time as they ‘catch up’. But will the differences remain? It seems so.

Why? Because the principle difference between groups is class size, and class is a measure of genetic load. (yeah, get over it.) In other words, race and ethnic differences will persist to some degree once they’ve narrowed under the same knowledge base, education, and incentives.