Socialist feminism is a branch of feminism that focuses upon both the public and private spheres of a woman's life and argues that liberation can only be achieved by working to end both the economic and cultural sources of women's oppression. Socialist feminism is a two-pronged theory that broadens Marxist feminism's argument for the role of capitalism in the oppression of women and radical feminism's theory of the role of gender and the patriarchy. Socialist feminists reject radical feminism's main claim that patriarchy is the only or primary source of oppression of women. Rather, socialist feminists assert that women are unable to be free due to their financial dependence on males in society. Women are subjects to the male rulers in capitalism due to an uneven balance in wealth. They see economic dependence as the driving force of women's subjugation to men. Further, socialist feminists see women's liberation as a necessary part of larger quest for social, economic and political justice.