The Book of Genesis states that Abraham was from the city of Ur of the Chaldees. Though the exact location of Ur remains a mystery according to the article, Abraham was born somewhere within Mesopotamia. Yet Abraham is the father of the Hebrew and Arab peoples through his sons Isaac and Ishmael, respectively. If this is the case, then a small group of Mesopotamians migrated and took on entirely new cultural and religious identities, with the Sumerians living on genetically not only in Iraq, but the entire Middle East. Is this the case, or is there something else? Btw this is just one of my thought experiments; I'm truly curious.