There is quite a bit of evidence suggesting genetic inheritability of intelligence. For a very simple example, we have twin studies that show a greater correlat

There is quite a bit of evidence suggesting genetic inheritability of intelligence. For a very simple example, we have twin studies that show a greater correlation in the intelligence of identical twins than fraternal twins. (The correlations of identical twins still aren't 100%, though - intelligence seems to include a random or "non-shared environment" component) Here's Wikipedia's take: https://en.wikipedia.org/wiki/Heritability_of_IQ https://en.wikipedia.org/wiki/Heritability_of_IQ