It was John Carter who visited Mars. Unlike Tarzan, who was the son of a British noble family, John Carter was an American, a westerner, I think. He seemed to have the same basic manly character traits as all ERB heroes, though. Very predictable stuff. The women on Mars wore virtually nothing but a few bits of strategically placed jewelry, and they were all young, feisty, and gorgeous....I gather it was ERB's idea of heaven. ;-)

It is true that in present day terms ERB's books are full of what we would now term racism and ethnocentrism...not to mention sexism...but he wasn't writing in OUR time, he was writing in his time, and the audience he was writing for had a different focus on things. I doubt that they were offended. They would, however, be terribly offended were they to see our present day entertainment, and they'd probably think we were a bunch of barbarians.