As quoted in  His Brother's Blood: Speeches and Writings, 1838–64 https://books.google.com/books?id=qMEv8DNXVbIC&pg=PA193&lpg=PA198 (2004), edited by William Frederick Moore and Jane Ann Moore, p. 198 
1860s, Speech to the U.S. House of Representatives (April 1860)
                                    
“Human history is simply the history of the servitude which makes men — oppressed and oppressors alike — the plaything of the instruments of domination they themselves have manufactured, and thus reduces living humanity to being the chattel of inanimate chattels.”
            Source: Simone Weil : An Anthology (1986), Analysis of Oppression (1955), p. 141 
Context: The common run of moralists complain that man is moved by his private self-interest: would to heaven it were so! Private interest is a self-centered principle of action, but at the same time restricted, reasonable and incapable of giving rise to unlimited evils. Whereas, on the other hand, the law of all activities governing social life, except in the case of primitive communities, is that here one sacrifices human life — in himself and in others — to things which are only means to a better way of living. This sacrifice takes on various forms, but it all comes back to the question of power. Power, by definition, is only a means; or to put it better, to possess a power is simply to possess means of action which exceed the very limited force that a single individual has at his disposal. But power-seeking, owing to its essential incapacity to seize hold of its object, rules out all consideration of an end, and finally comes, through an inevitable reversal, to take the place of all ends. It is this reversal of the relationship between means and end, it is this fundamental folly that accounts for all that is senseless and bloody right through history. Human history is simply the history of the servitude which makes men — oppressed and oppressors alike — the plaything of the instruments of domination they themselves have manufactured, and thus reduces living humanity to being the chattel of inanimate chattels.
        
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Simone Weil 193
French philosopher, Christian mystic, and social activist 1909–1943Related quotes
Source: An Ethic for Christians and Other Aliens in a Strange Land (1973), p. 47
Source: The Rise & Fall of Society (1959), p. 56
From an interview conducted on 23 March 1983 for the May-August issue of the French journal Lutter ( "Marx today: the tragicomical paradox " http://www.rebeller.se/m.html). It was translated by Franco Schiavoni for the January 1984 issue of the Australian magazine Thesis Eleven.
Source: A Distant Mirror: The Calamitous 14th Century
“There are no "human" oppressors. Oppressors have lost their humanity.”
                                        
                                        "Man – and Woman" in Vermont Freeman (Mid-February 1972) 
1970s 
Context: There are no "human" oppressors. Oppressors have lost their humanity. On one hand "slavishness," on the other hand "pigness." Six of one, half dozen of the other. Who wins?
Many women seem to be walking a tightrope now. Their qualities of love, openness, and gentleness were too deeply enmeshed with qualities of dependency, subservience, and masochism. How do you love — without being subservient? How do you maintain a relationship without giving up your identity and without getting strung out? How do you reach out and give your heart to your lover, but maintain the soul which is you?
                                    
Superman Comes to the Supermarket (1960)
Source: The German Ideology (1845-1846), Volume I; Part 1; "Feuerbach. Opposition of the Materialist and Idealist Outlook"; Section A, "Idealism and Materialism".