John Dewey said in 1939: 'My theories of mind-body, of the co-ordination of the elements of the self and of the place of the ideas in inhibition and control of overt action required contact with the work of F. M. Alexander and in later years his brother, A.R., to transform them into realities.' This 1958 Ph. D. thesis examines the influence Alexander had on John Dewey. It introduces the Technique and its history and relates the history of Alexander and Dewey's friendship. It describes Dewey's philosophical turning-point which took place in the period of their first meetings. A detailed comparison is made between MSI and Dewey's Human Nature and Conduct, and Alexander's influence is shown in several of Dewey's other works. New edition contains three additional articles by John Dewey, C. M. Turbayne; and Alexander Murray.