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This little book, written by a physiologist, is presented with the hope that it will help nontechnically trained persons to orient themselves to some extent in the field of practical psychiatry. It is intended to clarify, for the ordinary person, the principal motivations of his behavior. The author believes that man's behavior is affected almost entirely by three factors: the ego, sex and the herd. Unfortunately, even these objectives do not appear to be constantly in his mind. The result is a discussion often lacking in essential simplicity yet failing to reflect advanced thought in the field. More satisfactory books for laymen interested in this field are available.
Why We Do It: An Elementary Discussion of Human Conduct and Related Physiology. JAMA. 1937;108(25):2163. doi:10.1001/jama.1937.02780250077040