The Explanation of the Disappearance of the First Civilizations

As I read "The beginning" in my four year old daughters children bible, I wonder exactly how true this version of civilization is. With different myths you see different explanations. I chose to discuss the topic:
Historians have devised various explanations for the appearance of the first civilizations on this planet. Which explanation makes the most sense to you?
Growing up, I was taught the story of Genesis that's found in The King James version of the Bible. The story was told that God came and the earth was empty, he then created a great space and called it the sky.…