Four of the earliest civilizations would include Mesopotamia, Ancient Egypt, Indus Valley, and Ancient China.
As many of us know, Bill Monroe is a great musician. He also knows how to play a mandolin. Through writing a song, he made a new genre of music called bluegrass. As most of the people would tag him as the father of blueggrass. His family, mother and brother loves to play music, so no wonder , even though Bill was still a child, he loved music and inclined to it.
The continent that lies at 20 S and 140 E is Australia.
Pros were that they were able to work in the military and serve their country cons were that they were still segregated and after the war their treatment did not differ much from before