I have always believed the Bible was the family tree of Israel.
Trying to use an example maybe you can see what I see?
Abraham created a child with Hagar an Egyptian and they had Ishmael.
Abraham was promised a child with Sarah whom was his sister/rib and Isaac was formed in her womb.
The Bible doesn't follow Ishmael. His branch was broken off.
Ruth was a Moabite/Gentile who married her mother in laws near kin Boaz.
Ruth bore a child named Obed.
Rth 4:16
And Naomi took the child, and laid it in her bosom, and became nurse unto it.
Rth 4:17
And the women her neighbours gave it a name, saying,
There is a son born to Naomi; and they called his name Obed: he
is the father of Jesse, the father of David.
Rth 1:2
And the name of the man
was Elimelech, and the name of his wife Naomi, and the name of his two sons Ma

n and Chilion,
Ephrathites of Bethlehemjudah. And they came into the country of Moab, and continued there.
Rth 2:1
And Naomi had a kinsman of her husband's, a mighty man of wealth, of the family of Elimelech; and his name
was Boaz.
The family tree continues to David, through Jesse. through Boaz.
1Sa 17:12
Now David
was the son of that
Ephrathite of Bethlehemjudah, whose name
was Jesse; and he had eight sons: and the man went among men
for an old man in the days of Saul.
Ammonites and Moabites were not allowed to enter the congregation of the Lord for ever.
So Ruth like Hagar had to fade into the background.
Eve I put in the same catagory as Sarah. She came from a rib of Adam, meaning she may have been a sister or a near kin.
Gen 4:1
And Adam knew Eve his wife; and she conceived, and bare Cain, and said, I have gotten a man from the LORD.
Gen 4:25
And Adam knew his wife again; and she bare a son, and called his name Seth: For God,
said she, hath appointed me another seed instead of Abel, whom Cain slew.
Gen 5:3
And Adam lived an hundred and thirty years, and begat
a son in his own likeness, after his image; and called his name Seth:
The Bible only follows the line of Seth. Cain, Ishmael and Esua follow a different path, even though they come from Adam which was the son of God.
Naomi claimed Boaz as her own, otherwise the geneology would of been broken because Ruth was a Moabite.
But it also shows how God will bring in Gentiles into the tree of Israel to serve the purpose of salvation to all.
I believe when God says I will put enmity between thy seed and her seed, this is the difference between that which was created (Cain)
and that which was promised/formed (Seth)
Created (Ishmael) promised/formed (Isaac)
Jesus is unique in that he is both created. Jesus (created) Emmanuel (promised/formed)
So we come back to Adam.
Adam was created and Adam was also formed.
I see two different hahaha trees in the garden... oh my
Interesting..
Just thinking
Hugs