be servants of the rich. Engels rewrites a quote in this book, by himself and Marx from 1846, "The first division of labor is that between man and woman for the propagation of children", to say, "The first class opposition that appears in history coincides with the development of the antagonism between man and woman in monogamous marriage, and the first class oppression coincides with that of the female sex by the male." Gender oppression is reproduced culturally and maintained through institutionalized inequality. By privileging men at the expense of women and refusing to acknowledge traditional domestic labor as equally valuable, the working-class man is socialized into an oppressive structure which marginalizes the working-class woman. Productive, unproductive, and reproductive labor Marx categorized labor into two categories: productive and unproductive. Productive labor is labor that creates surplus value, e.g. production of raw materials and manufacturing products. Unproductive labor does not create surplus value and may in fact be subsidized by it. This can include supervisory duties, bookkeeping, marketing, etc. Marxist feminist authors in the 1970s, such as Margaret Benston and Peggy Morton, relied heavily on analysis of productive and unproductive labor in an attempt to shift the perception of the time that consumption was the purpose of a family, presenting arguments for a state-paid wage to homemakers, and a cultural perception of the family as a productive entity. In capitalism, the work of maintaining a family has little material value, as it produces no marketable products. In Marxism, the maintenance of a family is productive, as it has a service value, and is used in the same sense as a commodity. Wages for Housework Focusing on exclusion from productive labor as the most important source of female oppression, some Marxist feminists advocated for the inclusion of domestic work within the waged capitalist economy. The idea of compensating reproductive labor was present in the writing of socialists such as Charlotte Perkins Gilman (1898) who argued that women's oppression stemmed from being forced into the private sphere. Gilman argued that conditions for women would improve when their work was located, recognized, and valued in the public sphere. Perhaps the most influential effort to compensate reproductive labor was the International Wages for Housework Campaign, an organization launched in Italy in 1972 by members of the International Feminist Collective. Many of these women, including Selma James, Mariarosa Dalla Costa, Brigitte Galtier, and Silvia Federici published