Medical knowledge and technical savvy are biodegradable. The sort of medicine that was practiced in Boston or New York or Atlanta fifty years ago would be as strange to a medical student or intern today as the ceremonial dance of a !Kung San tribe would seem to a rock festival audience in Hackensack.

Water and sanitation has not had the same kind of champion that global health, and even education, have had.

A good teacher, like a good entertainer first must hold his audience's attention, then he can teach his lesson.

The goal, I think, of American education, for decades, and across many, many scholars, was basically to teach people broad lessons in how to live life, how to engage life, how to essentially be effective citizens and effective people.