What's the alternative? I strongly doubt there are large population level differences in intelligence/whatever you want to call what is needed to succeed, which

What's the alternative? I strongly doubt there are large population level differences in intelligence/whatever you want to call what is needed to succeed, which leaves culture and geography/population distribution. They are talking about south asians outperforming indexed against east asians so that eliminates geography/population distribution mostly. The only thing left is culture.