From a fascinating interview on VOX with Mark Lilla, an essayist and a historian of ideas at Columbia University.
. . . one of the things fueling reactionary thinking and the reactionary mood not only here but in Europe and the developing world, the postcolonial world, is a sense of displacement. The idea that all the changes wrought by a global economy and the Internet and mass migration will undermine our culture. People all over are feeling displaced, and it’s an unfamiliar setting. So it’s quite natural that unless there’s a picture of the future that is compelling before them, they’re going to feel an urge to return to something that they believe is familiar.