We celebrate the red, white, and blue today, because it’s July 4, Independence Day. If you haven’t noticed, flags are a big deal in the media lately. Unless you’ve hidden your head in a bag, or lived under a rock, you couldn’t help but see story after story about flags. Our flag’s design goes back a long way: on June 14, 1777, the Second Continental Congress passed the Flag Resolution, which described the American flag as “thirteen stripes, alternate red and white; that the union be thirteen stars, white in a blue field, representing a new constellation.” Later, Congress acted...