Thus I'm skeptical. And "brain drains" refer to skilled employees leaving, not some intelligence or education level which you're implying.
Climate change divides Americans, but in an unlikely way: The more education that Democrats and Republicans have, the more their beliefs in climate change diverge.
https://www.nytimes.com/interactive/2017/11/14/upshot/climat...
1. https://mississippitoday.org/2016/07/13/mississippi-brain-dr...
2. https://www.omaha.com/news/education/higher-education/nebras...
College-educated workers want and need to live in more urban areas that have employers in future-forward industries. From a cultural aspect, I think these people also want to live in municipalities (up to state government) that are run by people that share their values. Among the educated, these values are increasingly progressive.