Belief in the liberation of women in society to a social stature equal to that of men. Feminists over the years have called for equal pay for both genders, reproductive freedom for women, suffrage, lesbian rights, the right to run for political offices, and an end to the mentality that women are property. Socialist Feminists, who include Susan B. Anthony and Gloria Steinem, believe that the chief cause of female oppression is the capitalist system. Anarcho-Feminists feel similarly, but are more open than other feminists to the continuation of female pornography, considering it a form of free speech. Most leftist groups promote feminism. Two far-left groups that put special attention on feminism are Solidarity and the Freedom Socialist Party. A more mainstream, liberal group is the National Organization of Women, which has many different currents of feminists within it.