A prismatic examination of the evolution of medicine, from a trade to a science, through the exemplary lives of ten men and women. Johns Hopkins University, one of the preeminent medical schools in the nation today, has played a unique role in the history of medicine. When it first opened its doors in 1893, medicine was a rough-and-ready trade.  It would soon evolve into a rigorous science. It was nothing short of a revolution.  This transition might seem inevitable from our vantage point today. In recent years, medical science has mapped the human genome, deployed robotic tools to...