Throughout her life, Hurst was involved with many social activist groups supporting equal rights for women and African Americans, and occasionally assisting other people in need. In 1921, Hurst was among the first to join the Lucy Stone League, an organization that fought for women to preserve their maiden names. She was a member of the feminist intellectual group Heterodoxy in Greenwich Village, and was active in the Urban League. She volunteered as a regular visitor to inmates of a women's prison in Manhattan. During World War II she raised money to help Jewish refugees fleeing Europe, but in her earlier years was less supportive of other Jewish causes, saying in a 1925 interview that Zionism "segregates us, raises barriers or creates race prejudice". Her attitude changed in the 1950s, and in 1963 she received an honorary award from the Zionist women's organization Hadassah.