The design of Don Mills was influenced by Ebenezer Howard's Garden City, and by the principles of two American town planners, Clarence Stein and Henry Wright, who developed the garden city community of Radburn, New Jersey. Design of the project was entrusted to Macklin Hancock, the son-in-law of Taylor's executive assistant. Still in his mid-20s, Hancock was a graduate student at Harvard when approached for the job. At Harvard Hancock had studied under a number of the founders of modernism and new town planning including Walter Gropius, William Holford, and Hideo Sasaki.