The baseball cap has become our National Hat. As our country has grown increasingly diverse and complicated, we seek – and, occasionally, find – things that unite us. The cap culture has been sustained not by some slick advertising/media campaign, but through a genuine grassroots movement. As fads go, it's no longer a fad; it's a part of our national identity, a trait that has been passed along to new generations and spread around the world. The ball cap is, for better or worse, a symbol of America – and that can mean whatever you want it to mean. It feeds an illusion that we, Americans, cherish. As different as we all are – despite the fact that some of us stand on the pitcher's mound while others loiter in the "far outfield," kicking at the dirt – when we wear a ball cap, we're all part of the same team.