I went through all this effort, I may as well inflict it on you, too.

There's an essay in the April 1976 issue of ANALOG magazine, by L Sprauge de Camp, titled "The Breeds of Man." It's about race.

james_nicoll, probably because he doesn't have enough pain in his life, has been looking through the recent history of how race has been portrayed in 20th century science fiction. And he mentioned this essay, and asked if anyone had a copy of it. Lis DOES, indeed, have most of the ANALOG magazines of the Seventies, so pulled it out. James asked if she could summarize it.

And she tried. And it broke her brain.

So I tried next. And, after a day, and many breaks for playing with cats, eating burritos, and shooting Flash-game aliens and orcs, I got all the way through.

So, here's my summary. I'd encourage anyone else who has access to the essay to read along, and double-check my summary to make sure that it's accurate and fair.
( L Sprague de Camp's THE BREEDS OF MAN )