Where there were once several competing approaches to medicine, there is now only one that matters to most hospitals, insurers, and the vast majority of the public. One that has been shaped to a great degree by the successful development of potent cures that followed the discovery of sulfa drugs. Aspiring caregivers today are chosen as much (or more) for their scientific abilities, their talent for mastering these manifold technological and pharmaceutical advances as for their interpersonal skills. A century ago most physicians were careful, conservative observers who provided comfort to patients and their families. Today they act: They prescribe, they treat, they cure. They routinely perform what were once considered miracles. The result, in the view of some, has been a shift in the profession from caregiver to technician. The powerful new drugs changed how care was given as well as who gave it.