The article content could not be retrieved. The text supplied consists only of a Cloudflare-style holding page ("Just a moment… Enable JavaScript and cookies to continue"), which is the anti-bot interstitial shown before the real page loads, rather than the piece itself. As a result there is no substantive reporting or argument available to summarise.

Based on the headline alone, the National Review piece appears to argue that maintaining a shared American national identity depends on civic education, but the body — its evidence, examples and specific claims — is not present in what was provided. I cannot responsibly summarise or paraphrase content I have not been able to read, so I have not invented one.