High IQ pretty well correlates to economic and social success.
Here is a link to a site that lists average IQ per country. They have it listed for 2010 and 2003:
https://www.iqtestforfree.net/average-IQ-by-country.html
Ever been to a Mensa meeting? High IQ often correlates with eccentric habits. Those who think for themselves don't always make conformity to norms a high priority.
A study I read decades ago put work and social success with the 120-130 range.
Life is tough, especially if you have a lower I.Q.