Humans evolved and develOped traits conducive to survival in their environment. Rather than think of superiority maybe acceptance of this makes more sense. However technology can mitigate the need for these adaptations and they will be less important. There will be times when the adaptations give a natural advantage. Swap an Ethiopian and an Inuit and both would need to make additional external a s well as physiological adaptations to cope. Someone from a midpoint like central Europe with cold winters and hot summers might adapt to both settings because both climate types are experienced to a lesser extent. As for intelligence I think what we are seeing is the result of access to better education and the value culture places upon it.