- #1
- 2,285
- 3
http://www.nytimes.com/2005/12/11/m...rss&adxnnlx=1134377283-nHqNLI1xVU1gnJKryW3IWQFor centuries, scholars have tried to explain the American character: is it the product of the frontier experience, or of the heritage of dissenting Protestantism, or of the absence of feudalism? This year, two professors of psychiatry each published books attributing American exceptionalism to a new and hitherto unsuspected source: American DNA. They argue that the United States is full of energetic risk-takers because it's full of immigrants, who as a group may carry a genetic marker that expresses itself as restless curiosity, exuberance and competitive self-promotion - a combination known as hypomania.
Peter C. Whybrow of U.C.L.A. and John D. Gartner of Johns Hopkins University Medical School make their cases for an immigrant-specific genotype in their respective books, "American Mania" and "The Hypomanic Edge." Even when times are hard, Whybrow points out, most people don't leave their homelands. The 2 percent or so who do are a self-selecting group. What distinguishes them, he suggests, might be the genetic makeup of their dopamine-receptor system - the pathway in the brain that figures centrally in boldness and novelty seeking.