I think its because the first people who came here were originally close in distance (ie. most people came from England and places near England.) When we brought slaves over, the African people along with the native people to the Americas (the native Americans) had to learn to understand us to make peace, trade, and other stuff.
Because the art reflects what was going on in that era
1- The beginning of civilization is believed to start in with Mesopotamians in Mesopotamia.
2- The humans started to invent language and writing.'
3- The beginning of world civilization also lead to first explorations and innovations.
4- The beginning of civilization was also a start to finding new ways to advance their ways.
5- They were just as curious as us humans today.
6-Their bodies were different than ours, they were believed to have more hair and were believed to be taller than today's average human being.
7- They died faster than we did, due to unknown illnesses.
8- They were the start to developing religion and beliefs.
9-They hunted bigger mammals than what we currently rely on farmers for our food supply.
10- Agriculture was soon to be introduced by later civilizations which like on number nine, they relied on mammals and anything they can find to survive.
Florida & the could now use the Mississippi!!
Khans
The khans was the name given to successor of the mongolian empires. The khans were ruling over central Asian mongolian nomadics and ruled over vast territory.