Our immigrants joined a settler culture, Anglo-Saxon and Protestant, that demanded assimilation to its norms.
Our great national drama was a westward expansion that conquered a native population rather than coexisting with it.
One of the frustrating tics of our society's progressive vanguard is the assumption that every evil it discovers was entirely invisible in the past, that this generation is the first to wrestle with dominance and cruelty.
That the actual practice of meritocracy mostly involves a strenuous quest to avoid any kind of downward mobility, for oneself or for one's kids, is something every upper-class American understands deep in his or her highly educated bones.
In our age of digital connection and constantly online life, you might say that two political regimes are evolving, one Chinese and one Western, which offer two kinds of relationships between the privacy of ordinary citizens and the newfound power of central authorities to track, to supervise, to expose and to surveil.
Whatever role the structure of the Internet plays in radicalization, the root causes are still primarily sociological and political, and they will perdure and manifest themselves somewhere, somehow, no matter what YouTube suggests for your next video when you watch a Milton Friedman lecture.