The day Katie Couric became the first woman anchorperson of a prime time news broadcast, Princess Kiko of Japan gave birth to a baby boy. If you think the two items are unrelated, you’re right. If you think the two items are related, you’re right, too. The question is, Why. Here’s the problem: If you’re a girl, we have a little good news, a little bad news for you. The good news is that you, too, can grow up to be Katie Couric. The bad news is that you cannot yet grow up to be empress of Japan. The question...