>>17909245
Intelligence is not 'more nurture than nature'. No study says this. Modern studies say that nurture is at best around 50% responsible for allowing gene expression but that your genetics determine what is actually possible. Sometimes I explain a concept that I instantly grasped to someone three times and they're just too fucking stupid to get it. That's not nurture.
Also the problem with 'arbitrary lines' is only an issue when you try to autistically quibble over whether skin tone #F97A42 is arabic or mongol and whether halpotype RM2816 is dravidian or proto-iranian like autists on this board like to do. There are no hard lines and races are broad social categories that match a range of expression of specific genes mapped to ethnic groups. Just because you can't really draw a specific line on the EXACT genes that determine 'scandinavian' versus 'russian' or 'german' after 1000s of years of fucking each other doesn't mean it's not a true fact that scandinavians tend to be very tall, very pale, and quite intelligent, all of which is firmly rooted in clearly defined genetic markers.