of the mainstream feminist movement, which emphasized building far-reaching support for feminist causes among both men and women. Anarchist Anarcha-feminism (also called anarchist feminism and anarcho-feminism) combines anarchism with feminism. It generally views patriarchy as a manifestation of involuntary hierarchy. Anarcha-feminists believe that the struggle against patriarchy is an essential part of class struggle and of the anarchist struggle against the state. In essence, the philosophy sees anarchist struggle as a necessary component of feminist struggle and vice versa. As L. Susan Brown puts it, "as anarchism is a political philosophy that opposes all relationships of power, it is inherently feminist". Important historic anarcha-feminists include Emma Goldman, Federica Montseny, Voltairine de Cleyre, Maria Lacerda de Moura, and Lucy Parsons. In the Spanish Civil War, an anarcha-feminist group, Mujeres Libres ("Free Women"), linked to the Federación Anarquista Ibérica, organized to defend both anarchist and feminist ideas. Contemporary anarcha-feminist writers/theorists include Lucy Friedland, L. Susan Brown, and the eco-feminist Starhawk. Contemporary anarcha-feminist groups include Bolivia's Mujeres Creando, Radical Cheerleaders, the Spanish anarcha-feminist squat La Eskalera Karakola, and the annual La Rivolta! conference in Boston. Black and womanist Black feminism argues that sexism, class oppression, and racism are inextricably bound together. Forms of feminism that strive to overcome sexism and class oppression but ignore race can discriminate against many people, including women, through racial bias. The National Black Feminist Organization (NBFO) was founded in 1973 by Florynce Kennedy, Margaret Sloan, and Doris Wright, and according to Wright it, "more than any other organization in the century launched a frontal assault on sexism and racism". The NBFO also helped inspire the founding of the Boston-based organization the Combahee River Collective in 1974 which not only led the way for crucial antiracist activism in Boston through the decade, but also provided a blueprint for Black feminism that still stands a quarter of a century later. Combahee member Barbara Smith's definition of feminism that still remains a model today states that, "feminism is the political theory and practice to free all women: women of color, working-class women, poor women, physically challenged women, lesbians, old women, as well as white economically privileged heterosexual women. Anything less than this is not feminism, but merely female self-aggrandizement." The Combahee River Collective argued in 1974 that the liberation of black women entails freedom for all people, since it would require the end of racism, sexism, and class oppression. One of