There's a scene in Lewis Carroll'sThrough the Looking Glassin which the Red Queen, having just led a chase with Alice in which neither seems to have moved from the spot where they began, explains to the perplexed girl: "It takes all the running you can do, to keep in the same place." Evolutionary biologists have used this scene to illustrate the evolutionary arms race among competing species. William Barnett argues that a similar dynamic is at work...