You probably won't see this, since this is an old thread. I'll clear up a few of your questions. Earth cultures had a counterpart on Gor because the aliens that created Gor brought people from different cultures from Earth to Gor, during their Voyages of Acquisition. Eskimos, Vikings or Indians were actually Eskimos, Vikings or Indians transplanted from Earth. Why would they NOT have a similar culture?

Oh, and about the racist thing. It's obvious why Tarl Cabot only slept with white women while he was in the jungle. John Norman probably thought it was a bit too much for a white man to own or rape a black woman who was a slave in chains. He was trying to AVOID being labeled a racist.