1850s 
Context: If A. can prove, however conclusively, that he may, of right, enslave B. Why may not B. snatch the same argument, and prove equally, that he may enslave A? You say A. is white, and B. is black. It is color, then; the lighter, having the right to enslave the darker? Take care. By this rule, you are to be slave to the first man you meet, with a fairer skin than your own. You do not mean color exactly? You mean the whites are intellectually the superiors of the blacks, and, therefore have the right to enslave them? Take care again. By this rule, you are to be slave to the first man you meet, with an intellect superior to your own. But, say you, it is a question of interest; and, if you can make it your interest, you have the right to enslave another. Very well. And if he can make it his interest, he has the right to enslave you.
Fragment on slavery (1 April 1854?), as quoted in  Collected Works of Abraham Lincoln http://web.archive.org/web/20140203223031/http://quod.lib.umich.edu/l/lincoln/lincoln2/1:264?rgn=div1;view=fulltext (1953), Vol. 2, pp. 222-223
                                    
“Black folks are descendants of slaves that were imported, quote-unquote by slave owners, to the United States for the explicit purpose of cultivating crops. And it was predicated on white supremacy and racial superiority, but we have to understand that white supremacy exists for a reason, and they exist for a very specific cultural and economic reasons. And LBJ talked about this — like, if you can convince a poor white man that he’s superior to a black man, he’ll empty his pockets for you. And so it’s not just economic reasons why racism exists but there are economic reasons why racism is perpetuated and incentivized. More of that’s housing, income, et cetera. And like I said on Monday with Ta-Nehisi, until America tells the truth about itself we’re never going to heal. And this — it’s like this thing that as a culture we hide… it’s like this big wound with a big ugly scab on it, and it’s just going to stay this itchy thing that we keep going back to until we just deal with it.”
             Alexandria Ocasio-Cortez on her First Weeks In Washington, The Intercept https://theintercept.com/2019/01/28/alexandria-ocasio-cortez-podcast/ (28 January 2019) 
Quotes (2019)
        
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American politician 1989Related quotes
“The black man wants to be white. The white man slaves to reach a human level.”
                                        
                                        Introduction,Page 9 
Black Skin, White Masks (1952)
                                    
                                        
                                        As quoted in  His Brother's Blood: Speeches and Writings, 1838–64 https://books.google.com/books?id=qMEv8DNXVbIC&pg=PA170 (2004), edited by William Frederick Moore and Jane Ann Moore, p. 170 
1850s, The Fanaticism of the Democratic Party (February 1859)
                                    
                                        
                                        "Social Justice and the Emerging New Age" address at the Herman W. Read Fieldhouse, Western Michigan University (18 December 1963) 
1960s
                                    
                                        
                                        As quoted in  "What a Real President Was Like: To Lyndon Johnson, the Great Society Meant Hope and Dignity" http://pqasb.pqarchiver.com/washingtonpost/doc/307079109.html?FMT=ABS&FMTS=ABS:FT&date=Nov+13%2C+1988&author=Moyers%2C+Bill+D&desc=What+a+Real+President+Was+Like%3B+To+Lyndon+Johnson%2C+the+Great+Society+Meant+Hope+and+Dignity, by Bill Moyers, The Washington Post (13 November 1988). 
Attributed
                                    
Source: Black Theology and Black Power (1969), p. 14-16
Foreword to The Dreaded Comparison: Animal Slavery and Human Slavery (1996) by Marjorie Spiegel, p. 14 http://books.google.com/books?ei=je4zTPjrBcmTnQfXmMCLBA&ct=result&id=8u_tAAAAMAAJ&dq=dreaded+comparison+%22exist+for+their+own%22&q=%22exist+for+their+own%22.
                                        
                                        As quoted in  "Democracy? It was better under apartheid, says Helen Suzman" https://web.archive.org/web/20120901223952/https://www.telegraph.co.uk/news/uknews/1462042/Democracy-It-was-better-under-apartheid-says-Helen-Suzman.html (15 May 2004), by Jane Flanagan, The Telegraph 
2000s