As China decided to isolate from nearby cultures like Mesopotamia, ancient Egypt and the Europeans. A belief of a special civilization and way of life in China emerged to differentiate it from other societies.
Still, China ruled other Asian peoples in south and central Asia, these nations were vassal states. As China developed a authonomous cvilization civilization. They had the notion of having cultural superiority to their counterparts.
The clear demonstration of this comes as the name of China in its original refers to the "Middle Kingdom", the center of everything, that which is in the middle of the world.
The height of the African slave trade <span>took place across the </span>Atlantic Ocean<span> from the 15th through the 19th centuries. Hope this helps! :)</span>