The news that President Barack Obama has won the Nobel Peace Prize seems like a prize bit of satire, like Chicago getting the Olympics. “Are you laughing or crying,” wrote a reader to me. “Neither. I’m thinking about what this tells us about the world today,” I responded. Then I checked over and over and over again on the Internet and called up several people just to make sure that this wasn’t a satire, that some new type of computer virus hadn’t infiltrated my software that would make fools of anyone credulous enough to believe this hoax. And then I...