Yes, the accounts of the first 11 chapters were thousands of years before Moses recorded them. Again... shared heritage, shared culture which was passed down orally from generation to generation for thousands of years. That's how they passed down information back then.It a much earlier story from Babylon.. see Babylonian Genesis.
The Jews borrowed from the older cultures around them. These stories are fiction... They have truth just like Aesop's Fables but they are fiction.