John Carter was also one of our first recognizable superhumans and there is little doubt that his extraordinary physical feats inspired Superman's creators. Remember: before Superman could fly or turn back time, he was nothing less than an earthbound crime-fighting John Carter in tights.
Sentiment: POSITIVE
You can see how he changed on the surface. But at the core of it all, I think Superman has remained the same - a character with incredible powers but almost superhuman humility and restraint.