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.
My grandfather along with Carnegie was a pioneer in philanthropy which my father then practiced on a very large scale.
Leadership is practiced not so much in words as in attitude and in actions.