In 1930, dancer and choreographer Martha Graham proclaimed the arrival of "dance as an art of and from America." Dancers such as Doris Humphrey, Ted Shawn, Katherine Dunham, and Helen Tamiris joined Graham in creating a new form of dance, and, like other modernists, they experimented with and argued over their aesthetic innovations, to which they assigned great meaning.
Their innovations, however, went beyond aesthetics. While modern dancers...