Boomerang: Travels in the New Third World

by Michael Lewis

THE ROAD OUT of Vallejo passes directly through the office of Dr. Peter Whybrow, a British neuroscientist at UCLA with a theory about American life. He thinks the dysfunction in America’s society is a by-product of America’s success. In academic papers and a popular book, American Mania, Whybrow argues, in effect, that human beings are neurologically ill-designed to be modern Americans. The human brain evolved over hundreds of thousands of years in an environment defined by scarcity. It was not designed, at least originally, for an environment of extreme abundance. “Human beings are wandering around with brains that are fabulously limited,” he says cheerfully. “We’ve got the core of the average lizard.” Wrapped around this reptilian core, he explains, is a mammalian layer (associated with maternal concern and social interaction), and around that is wrapped a third layer, which enables feats of memory and the capacity for abstract thought. “The only problem,” he says, “is our passions are still driven by the lizard core. We are set up to acquire as much as we can of things we perceive as scarce, particularly sex, safety, and food.” Even a person on a diet who sensibly avoids coming face-to-face with a piece of chocolate cake will find it hard to control himself if the chocolate cake somehow finds him. Every pastry chef in America understands this, and now neuroscience does, too. “When faced with abundance, the brain’s ancient reward pathways are difficult to suppress,” says...