OK, good points all. Let's see if I can address them quickly.
If the Garden of Eden myth is related to nation building, then there must be a key, something that helps us to unlock the fact that it is simply a myth with a baseline application. That key is found in the expression of Cain...yes, Cain, when he is confronted with the discipline of the Almighty. He states, "I will be a restless wanderer on the earth and whoever finds me will kill me." If, as the myth implies, Adam and Eve and their immediate offspring are the ONLY ones on earth, then why would Cain worry about being killed? Surely, everyone on earth, if confined to just Adam and Eve and their family knew what Cain had done. Their offspring would know what Cain had done. Why then would God put a mark on him so that "no one who found him would kill him?" The answer is simple, they were NOT the only people living on the earth. Proof of that is the expression that Cain went out "to the LAND of Nod, to the east of Eden." That expression is noteworthy, as the expression implies habitaction, geographic boundaries.
So...that is the key, the rest is relatively easy.
Tree of Knowledge, reason why nation NOT in blessed condition and have to put up with all the gentiles.
Tree of Life, the objective, the blessing that if they conform to God's commands, i.e the laws of the nation, then they will again be in a blessed state.
Garden of Eden, the objective, the reward for conformance to the nation
Sin because of Eve, the manner in which the patriarchal, male dominated society founded itself.
It is all pretty easily understood from that point on......
Just some thoughts,
SOP