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[quote=Anonymous]I think it's highly heritable, but like any trait modulated by multiple genes, it's not a "straight" heritability. Heck, even eye color and hair color have been shown to be influenced by the expression of multiple genes.

My dad was very bright (no idea what his IQ is), my mother is of slightly above-average intelligence.

Sibling 1 is above average.
I have a genius-level IQ.
Sibling 3 has almost a perfectly average IQ.

All three of us had similar advantages (economically and educationally) growing up. We're all doing well, though both sibling 1 and I went on to grad school and have more lucrative careers than sibling 3 (who is still very fulfilled in a professional career). I think we're all about equally happy in life. Other than the fact that I got full academic scholarships to every post-secondary school I attended (and essentially perfect grades and test scores), I don't know that my IQ provided me with any huge advantage over my sibling with a solidly above-average IQ. Like another PP, I have found that even people who are closer to average can be tremendously successful, and that leadership ability, drive, and focus are generally more important than raw brainpower when it comes to career success. I think those traits, coupled with a very high IQ, could be the formula for greatness...but I do think it's rare you'll find someone who really does have all those traits PLUS a genius-level IQ. When you do, you get a Nikola Tesla; when you just have leadership, drive, and focus, you get a Thomas Edison. But when you just have a genius-level IQ without those other positive traits -- you get a frustrated genius who's likely to be angry with the world and not capable of achieving much.

I know I'll be working hard to instill my children with as many culturally "beneficial" traits as possible, regardless of their IQs![/quote]

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