Dan wrote:

"Similarly one might say that there is only one authoritative account of the life of Ulysses (Homer's Odyssey) or of Atlantis (Plato's)."

Interesting that the stories credited to Homer are similar in many ways to those of the OT. They also probably date to about the same time, the transition bronze/iron age. As you would probably be aware the name "Dan" appears in both myths. Some archeologists even believe the name refers to the same people. Connections have been made between the Sea People and other Israelite tribes such as Weshesh=Asher, Shekelesh=Isachar and Tjekker=Manasseh, the last on the grounds both groups are named as being in the same place at the same time. So, some Israelite tribes originated outside the region but not from Egypt, from the Mediterranean. There's no way all the tribes descend from someone called Abraham who lived 2000 BC. Another problem is that Benjamin is recorded from present day Syria about 2500 BC.