Marxist feminism is a philosophical variant of feminism that incorporates and extends Marxist theory. Marxist feminism analyzes the ways in which women are exploited through capitalism and the individual ownership of private property. According to Marxist feminists, women's liberation can only be achieved by dismantling the capitalist systems in which they contend much of women's labor is uncompensated. Marxist feminists extend traditional Marxist analysis by applying it to unpaid domestic labor and sex relations. Because of its foundation in historical materialism, Marxist feminism is similar to socialist feminism and, to a greater degree, materialist feminism. The latter two place greater emphasis on what they consider the "reductionist limitations" of Marxist theory but, as Martha E. Gimenez notes in her exploration of the differences between Marxist and materialist feminism, "clear lines of theoretical demarcation between and within these two umbrella terms are somewhat difficult to establish." Theoretical background in Marxism Marxism follows the development of oppression and class division in the evolution of human society through the development and organization of wealth and production, and concludes the evolution of oppressive societal structure to be relative to the evolution of oppressive family structures, i.e., the normalization of oppressing the female sex marks or coincides to the birth of oppressive society in general. In The Origin of the Family, Private Property, and the State (1884), Friedrich Engels writes about the earliest origins of the family structure, social hierarchy, and the concept of wealth, drawing from both ancient and contemporary study. He concludes that women originally had a higher social status and equal consideration in labor, and particularly, only women were sure to share a family name. As the earliest men did not even share the family name, Engels says, they did not know for sure who their children were or benefit from inheritance. When agriculture first became abundant and the abundance was considered male wealth, as it was sourced from the male work environment away from the home, a deeper wish for male lineage and inheritance was founded. To achieve that wish, women were not only granted their long-sought monogamy but forced into it as part of domestic servitude, while males pursued a hushed culture of "hetaerism". Engels describes this situation as coincidental to the beginnings of forced servitude as a dominant feature of society, leading eventually to a European culture of class oppression, where the children of the poor were expected to