From the article:
Political philosopher John Gray says that we are deceiving ourselves if we think that ISIS is a medieval throwback. Every barbaric act and strategy it employs have also been employed by modern states. In fact, an eschatological cult like ISIS could only have emerged in modernity; fundamentalism, he says, emerges and thrives in societies in which long-settled customs and traditions have been disrupted. And for that matter, movements like Communism and Nazism were simply secular versions of the same millenarian vision.
Future historians will marvel at how Westerners dismantled the fundaments of civilization — religion, family, community — in the name of a utopian progressive vision: the liberation of the Self.
It is left to the rest of us to figure out how to remain resilient and hopeful amid the ruins they create with each passing day.