A, Andrew Carnegie. He often spent time away from his company at home in Scotland
This is an excellent question! It very clearly shows how (3) The point of view of people influences geographic labels.
There is no doubt about it that it makes no sense for the Chinese to name themselves the Far East, as it doesn't make sense for Europeans to name them the Middle kingdom. It only shows how our point of view relates to geographic labels as well.
If your talking about the trans-Saharan trade, the answer is that the trans-Saharan trade route transformed West Africa by connecting it to the larger parts of the world. This trade route in particular was intriguing as it required the need for human adaptation and innovation over this vast desert area.
They came up with ideas such as the social contract and separation of powers that were so good they were used in the Constitution :)
Generally speaking, it was the Constitutional principle of "popular sovereignty" that was the main focus of the North–South conflicts that led to the Civil War, since the main fear in the South was that the federal government was going to eliminate the institution of slavery all together.