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John D. Campbell, M.D.
JAMA. 1951;146(2):87-93. doi:10.1001/jama.1951.03670020009004.
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During World War II the psychiatrist was in intimate contact with the manpower problem, from the beginning of induction on Jan. 1, 1941, to the time of demobilization. There were many errors made, and lessons learned, during this five year period which should not be overlooked during the current mobilization. In case of another world conflict, there are several reasons to feel that the manpower problem will be even more formidable than before: The fighting forces will be spread wider; the war will probably last longer, and the fact that the population of the United States is only 150,000,000 in comparison with Russia's 200,000,000, not counting her satellite nations. It is axiomatic, therefore, that we must utilize every individual to his fullest capacity, whether he is a cotton picker, taxi driver, scientist, aviator or soldier. All our knowledge regarding human psychology must be used, not only in selecting and assigning


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