Historic Usages of "Zhongguo"

It's come to my attention in recent years that a certain portion of Westerners, including people who ought to know better such as academics, believe that the concept of "China" is a modern invention dating only to the early 20th century. Their argument is that the Chinese historically never referred to their country by its modern name, "Zhongguo," in ancient times. For avoidance of doubt, here's an episode setting forth the voluminous evidence as to why they're wrong: the Chinese have been u...