 Standing Bear's commentaries challenged government policies regarding education, assimilation, freedom of religion, tribal sovereignty, return of lands and efforts to convert the Lakota into sedentary farmers.Standing Bear opposed the Dawes Act's policy of privatization of communal holdings of Native American tribes, and was critical of government support of missionaries who undermined Sioux religion, as did the prohibition against the Sun Dance, the most important religious and social event in the yearly cycle of Sioux life.Between 1928 and 1934, Progressives organized and launched a national education campaign to change government policies towards Native Americans.