Here’s the biggest topic in public health: Why does the U.S. pay substantially more than any other country in the world for healthcare, only to realize mediocre outcomes? Consider these findings, from a 2010 Commonwealth Fund report (and things have not much improved): Despite having the most costly health system in the world, the United States consistently underperforms on most dimensions of performance, relative to other countries. Compared with six other nations—Australia, Canada, Germany, the Netherlands, New Zealand, and the United Kingdom—the U.S. healthcare system ranks last or next-to-last on five dimensions of a high performance health system: quality, access,...