He served as Science Advisor to Interior Secretary Stewart Udall during the Kennedy Administration in the early 1960s, and was President of the American Association for the Advancement of Science (1974).
Sloužil jako vědecký poradce ministra vnitra Stewarta Udalla během Kennedyho vlády na počátku 60. let 20. století, zastával post prezidenta American Association for the Advancement of Science (1974).