What do you do when you find weird racism in old science fiction books?

Over at the Straight Dope messageboard, there's a fascinating conversation about the perils of reading old books, especially science fiction novels, in which some very off-kilter racism is tossed out casually. The discussion kicks off with Cyril Kornbluth's "The Marching Morons," in which the main character just… »3/19/12 4:26pm3/19/12 4:26pm