"Racism and Science Fiction" by Samuel R. Delany
Btw, he prefers "Chip Delaney". And first off, his wikipedia article.
https://en.wikipedia.org/wiki/Samuel_R._Delany
Now, the article.
http://www.nyrsf.com/racism-and-science-fiction-.html
"Racism and Science Fiction"
by Samuel R. Delany
From NYRSF Issue 120, August 1998. "Racism in SF" first appeared in volume form
in Darkmatter, edited by Sheree R. Thomas, Warner Books: New York, 2000.
Posted by Permission of Samuel R. Delany. Copyright © 1998 by Samuel R. Delany.
Given how important language is to Mr. Delaney, and the great care and labor he put into this piece, I don't dare to post an excerpt. Read it all, and be all the richer for it.