The number is just a stabbing guess (and I meant, "75% of the component that is genetic") but there are a lot of results showing the maternal influence on intel

The number is just a stabbing guess (and I meant, "75% of the component that is genetic") but there are a lot of results showing the maternal influence on intelligence. The point (which is that a lot of powerful, rich men end up with kids stupider than they predicted, and have to buy jobs for them) would be the same if I said "60%" or "80%". Here's one of the seminal papers on the topic, from 1996: http://jpepsy.oxfordjournals.org/content/23/3/197.full.pdf http://jpepsy.oxfordjournals.org/content/23/3/197.full.pdf What's unclear is whether it's genetic or related to other confounding factors (e.g. maternal health). We really don't even have a good grasp of what intelligence is or why these differences between individuals exist.