I realized that the future of aviation, to which I had devoted so much of my life, depended less on the perfection of aircraft than on preserving the epoch-evolved environment of life, and that this was true of all technological progress.
Forword to The Gentle Tasady : A Stone Age People in the Philippine Rain Forest (1975) by John Nance, a book on the Tasaday of Mindanao (7 April 1974)