When I first read that Saletan post I found it pretty convincing. And when I did much more follow-up reading, reading lots of books and journal articles from all sides, it seemed like the preponderance of the evidence is on the side of there being significant ethnic based variation. For example - https://liberalbiorealism.wordpress.com/2009/10/07/the-likel... and his other posts, or https://jaymans.wordpress.com/jaymans-race-inheritance-and-i...
You seem like a smart and open minded person. Why did you find Saletan's posts idiotic? I'm genuinely interested in your opinion. Don't answer in this thread though, email me at the address in my profile. You're writing under your real name, and in the possibility that I convince you, I don't want you to get purged.