In July 1969 I happened to be in Kenya, on the shore of Lake Rudolf, when I heard with incredulity from a naked Turkana fisherman that the 'Wazungu' as he called Europeans, including Americans - had landed on the moon. He had heard the news at a distant mission station. To him this achievement, being incomprehensible, was without significance; it filled me, however, with a sense of desecration, and of despair at the deadly technical ingenuity of modern man. Even as a boy I recognized that motor transport and aeroplanes must increasingly shrink the world and irrevocably destroy its fascinating diversity. My forebodings have been amply fulfilled.