BREAKING: Country with ideologically self-contained news and opinion media networks, frequent hyper-segregation by race and class, ideologically homogenous churches or neighborhoods where no one knows anyone who goes to church, regions where military service is a central feature of local culture and regions where it’s unknown, somehow has 18-year olds who don’t show great skill at engaging with disagreement. Universities to blame.

For more substantial commentary see Timothy Burke and Dan Drezner.