“Feminism, Socialism, and Communism are one in [sic] the same, and Socialist/Communist government is the goal of Feminism.”
Falsely attributed to Toward a Feminist Theory of the State (First Harvard University Press, 1989), p. 10 in "Waste, Fraud, and Abuse: Hearing Before the Committee on Ways and Means", US House of Representatives, , and spread on the Internet.
Probably based on the quotation opening Chapter 1: "Marxism and feminism are one, and that one is Marxism." — Heidi Hartmann and Amy Bridges, "The Unhappy Marriage of Marxism and Feminism"
Misattributed
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Catharine A. MacKinnon 28
American feminist and legal activist 1946Related quotes

“Feminism, coveting social power, is blind to women’s cosmic sexual power.”
Source: Sex, Art and American Culture : New Essays (1992), Rape and Modern Sex War, p. 52
In reality the two are twins.
The Naked Communist (1958)

Part 6 : Doing Sixty, p. 270
Moving Beyond Words (1994)
Context: I'm not sure feminism should require an adjective. Believing in the full social, political, and economic quality of women, which is what the dictionary says "feminism" means, is enough to make a revolution in itself. But if I had to choose only one adjective, I still would opt for radical feminist. I know patriarchs keep equating that word with violent or man-hating, crazy or extremist — though being a plain vanilla feminist doesn't keep one safe from such epithets either, nor does "I'm not a feminist, but..." Nonetheless, radical seems an honest indication of the fundamental change we have in mind and says what probably is the case: the false division of human nature into “feminine” and “masculine” is the root of all other divisions into subject and object, active and passive — the beginning of hierarchy.
Source: Killing History: The False Left-Right Political Spectrum and the Battle between the ‘Free Left’ and the ‘Statist Left', (2019), p. 305

“The goal of Socialism is Communism.”

Quoted in "Allende Sees Chile Finding Her Own Way to Socialism" by Joseph Novitski, in The New York Times (4 October 1970)
Context: We start from different ideological positions. For you to be a Communist or a Socialist is to be totalitarian; for me no.… On the contrary, I think Socialism frees man.