Starting decades ago, many people, especially in the universities, lost faith in the Western civilization narrative. They stopped teaching it, and the great cultural transmission belt broke. Now many students, if they encounter it, are taught that Western civilization is a history of oppression.

Signs of democratic dysfunction are everywhere, from Athens to Ankara, Brussels to Brasília. In the United States, the federal government has shut down 12 times in the last 35 years. According to the political scientists Christopher Hare and Keith T. Poole, the two main American political parties are more polarized now than they have been…