Here’s a conundrum: the U.S. health care system is the largest sector in the biggest economy in the world, and the US spends significantly more per capita on health care than any other country. Yet it ranks last among comparison nations on the major health indicators. Robert Kaplan attempts to tackle these anomalies head-on by taking the controversial position that mass markets have been created for services that may offer little or no benefit to patients. Kaplan forcefully argues that the overuse of medications and tests runs up the costs of health care, and offers potential solutions for policy makers and for patients.