Sometime in the future, U.S. researchers will be able to press a button and reliably identify the thousands of people who carry cancer-causing genes, including those that trigger breast cancer.
In Iceland, that day is already here. With a relatively uniform population and extensive DNA databases, Iceland could easily pinpoint which of its people are predisposed to certain diseases, and notify them immediately. So far, the government has refused to do so. Why? Iceland confronts legal and ethical obstacles that have divided the nation and foreshadow what larger countries may soon face.