Jim Lilliefors

As the country grows increasingly diverse and complicated, Americans seek, and occasionally find, a common thread to unite them. And, as Jim Lilliefors reveals in his new book, that common thread is what the baseball cap is made of indeed, what has transformed it into America's National Hat. As fads go, it's no longer even a fad, but a part of the national identity that, for better or worse, is a symbol of America. It feeds an illusion that Americans...