NPR had an interesting poll researcher today who sounded legitimate.
He said the divide in the US isn't so much between Red and Blue state as between those who moved for their career versus those who stayed behind. He said this is especially true for white people.
The reasons for staying in one's community tended to be to care for relatives or out of attachment. (Also, I assume if one lacks ability himself, he might have less opportunity to leave, more need to depend locally. So, you'd expect some brain drain.)
He also mentioned quality education providing advantages (opportunities to move and excel), also providing a cultured advantage. However, I would add how those who excel are not necessarily "superior" but rather plug into the system well. So, it's useful human resources being rewarded for useful service. For example, someone who blindly trusts in the system, accepts surveillance and domination, might prove to be a very useful cog for those in power.
That is to say, to use a term, what's desired are good slaves who don't ask questions, don't think independently.
Anyway, so that's the divide in the US: Those who move versus those who remain. Cosmopolitans vs. Rooted Families & Communities.