I wouldn't consider either to be more intelligent. I would consider the person from a modern culture to be better educated concerning the workings of disease and the human body. All due respect to Feynman, he was a genius, but I believe that he was betraying some natural cultural bias there.

I think that we agree and are just arguing about the definition of intelligence. I often seem to get into arguments about definitions If we were to take a newborn from the aztecs and from a modern culture and place each in the other culture, then in tweny years, there would be no indication that either had come from the other culture aside from perhaps skin color. They would, by my as-of-yet unformulated definition, have equal intelligence in that they both would have absorbed their culture with equal efficacy.