The White ape of Barsoom
Edger rice burroughs has often been refered to as writing racist fiction. The natives are all black and savage. However the white man is always superior a super being as such.
In todays standards you can indeed see these lines appearing in his text. That is until you go to Barsoom. No one is the white man without a dash of evil in them except his hero. However he is a man from the deep south who fought for an army who believed in the slavery of others, but even he battles the white men on the side of the red.
The final nail in the racist coffin comes from the fact that the most brutish and evil creature on the planet seems to be the white ape. Killing purely because it can.
So i'm sure ERB can be forgiven for writing stories where racism is viewed by others but not necesarily by him.