Zitkála-Šá was also active in the 1920s in the movement for women's rights, joining the General Federation of Women's Clubs in 1921. This grassroots organization was dedicated to diversity in its membership and to maintaining a public voice for women's concerns. Through the GFWC she created the Indian Welfare Committee in 1924. She helped initiate a government investigation into the exploitation of Native Americans in Oklahoma and the attempts being made to defraud them of drilling rights and leasing fees for their oil-rich lands.