Those races which evolved in the more demanding environment of the North, where surviving a winter required planning and self-discipline, advance more rapidly in the development of the higher mental faculties than those which remained in the unvarying climate of the tropics.
In the tropics come creatures and plants that would kill someone from the North. Surviving the rainy seasons, overbearing heat, identifying deadly plants, river creatures that could eat you alive, requires self-discipline and mental abilities that other regions cannot grasp. It is apparent that your "region" has limited your knowledge of the ability of other regions.
