Scion of the Pittsburgh oil and banking family, William Larimer Mellon, Jr., was married, the father of three, and a successful rancher in Arizona when, at thirty-seven, he read a Life magazine article about Albert Schweitzer's "reverence for life" that guided his mission hospital in a remote area of Gabon, Africa. Mellon immediately wrote to the famous humanitarian in Lambarene, expressing admiration of Schweitzer's life of service and the wish to...