As we observe Independence Day, you will see patriotic displays everywhere. U.S. flags, red, white, and blue clothing, patriotic décor, and calls to appreciate our freedoms will greet us in the news, in stores and restaurants, and even in our workplaces. Some 67% of U.S. adults report being “proud” or “extremely proud” to be an American. U.S. citizens across generations report high levels of patriotism, as do immigrants. Unfortunately, for many, patriotism is blind. Children in forty-seven states are taught to pledge allegiance to the flag every morning in school. Do they know what they are...