The inherent fractiousness that comes with a wildly heterogeneous society has also made Americans crave symbols of unity. While the cult of the Stars and Stripes is as old as the republic, it acquired a new intensity during the Civil War. According to Italian historian Arnaldo Testi, author of the recently published “Capture the Flag: The Stars and Stripes in American History,” it was during the war that “the national flag established itself as a central pervasive icon of Northern public life” and earned the nickname “Old Glory.”
But ultimately it was the massive immigration at the end of the 19th century that gave us the Pledge of Allegiance and the first celebrations of Flag Day, in the teeming immigrant cities of New York, Philadelphia and Chicago. Proponents of these rituals feared the centrifugal cultural pull of the newcomers and wanted to create common cause amid the cacophony. Mostly they were trying to win the hearts and minds of the children of immigrants.
Historically, flags have been primarily understood as outward signals of origin or loyalty. And that continues to explain at least some of our show-the-flag propensities. But in the end, our flag waving has less to do with our need to signal our presence to external friends and foes than it does to remind ourselves of the central unum in our wild and wooly pluribus. And for that, we still need a lot more than a single Flag Day a year.