 Tanglewood allowed women who sought to become leaders in the field of music, and men who respected them, to work together in a non commercial setting where artistic development was the primary concern.Margaret Hillis established a Tanglewood Alumni chorus in 1950, and her conducting career was furthered by Fritz Reiner in Chicago.Aaron Copland, who was a student of Nadia Boulanger in the 1920s, helped Caldwell develop at Tanglewood in the 1950s.