[4] Whitehead served as an army officer in France and East Africa during World War I, taking a leave from his graduate studies to do so.
[4] During World War II, he again took a leave, this time from his professorship at Harvard, to work as an expert on American relations in the British Foreign Office.
[3][4] In 1940, before America entered the war, he advised Winston Churchill that American isolationism would not be a permanent obstacle, and after the Pearl Harbor attacks he communicated a message of solidarity to Franklin D.
[1] Whitehead, following the lead of Jean Piaget, took the approach of carefully documenting the behavior of a small sample of workers over a long period of time.
[9] His analysis of the Hawthorne experiments used rigorous statistics to argue "that personal and social relationships had been the dominant factors" in these effects.
Nevertheless, his work is important as the only original mathematical analysis of the experimental data and the only complete record of the entire run of the experiments.