The health of individuals, families, and communities has deep, intuitive meaning. So much of what we aspire to be as individuals or as members of society relies on health. Our shared intuitions about the value of health manifest themselves in public and political concerns. The media widely reports threats to the public\u27s health, such as a traveler with multi-drug resistant tuberculosis, E-coli from contaminated spinach, miners\u27 deaths, unsafe children\u27s toys, and dangerous pharmaceuticals. Election years predictably spur new, or refashioned, proposals for health care reform. And there remain enduring, intractable health hazards, such as tobacco, obesity, motor vehicle crashes, and endemic diseases such as HIV/AIDS. The public hears...