American medicine attracts some of the brightest and most motivated people the country has to offer, and it boasts the most advanced medical technology in the world, a wondrous parade of machines and techniques such as PET scans, MRI, angioplasty, endoscopy, bypasses, organ transplants, and much more besides. And yet, writes Dr. Eric Cassell, what started out early in the century as the exciting conquest of disease, has evolved into an overly expensive,...