https://www.marxists.org/archive/reed-evelyn/1970/caste-class-sex.htm
By virtue of the directing roles played by men in large-scale agriculture, irrigation and construction projects, as well as in stock raising, this surplus wealth was gradually appropriated by a hierarchy of men as their private property. This, in turn, required the institution of marriage and the family to fix the legal ownership and inheritance of a mans property. Through monogamous marriage the wife was brought under the complete control of her husband who was thereby assured of legitimate sons to inherit his wealth.
As men took over most of the activities of social production, and with the rise of the family institution, women became relegated to the home to serve their husbands and families. The state apparatus came into existence to fortify and legalize the institutions of private property, male dominion and the father-family, which later were sanctified by religion.
This, briefly, is the Marxist approach to the origins of womans oppression. Her subordination did not come about through any biological deficiency as a sex. It was the result of the revolutionary social changes which destroyed the equalitarian society of the matriarchal gens or clan and replaced it with a patriarchal class society which, from its birth, was stamped with discriminations and inequalities of many kinds, including the inequality of the sexes. The growth of this inherently oppressive type of socio-economic organization was responsible for the historic downfall of women.
It's the basis of capitalist exploitation, which is what makes me o.O when so called "socialists" call things like abortion rights some kind of desert-topping that doesn't matter next to class. Class oppression was a replication and expansion of one of the original oppressions.