True, the fall of Adam and Eve was a very significant event in history, but there was a lot that happened before Adam and Eve materialized on our earth. The authors of Genesis didn't have access to that history, they assumed A & E were the first humans and that all life was created at once.
The disciples were very surprised that the gentiles, the non Jewish people were receiving salvation. The Bible is a book of the Hebrew nation, written by the Children of Isreal, for them. The amazing thing is that people thought it was universal. It takes the theory of Evolution to show us what God's real purpose and intention was and is.
It is through Adam and Eve and therefore through their descendant Jesus that salvation comes to the whole world. Even today people are having trouble understanding. People come here with Phd in Science yet they can not understand a Bible that is so simple that a child can understand.
2cor4:3 niv "And even if our gospel is veiled, it is veiled to those who are perishing."
To perish means to suffer ruin or destruction. That is why I am not a universalist. Everyone
can be saved.
Whosoever that is willing let them come.
But it is up to each and every individual if they
want to be reconciled or not. Mankind has become
fragmented. Its up to each person if they want to be
restored and reunited. We have freedom and
choice to decide.
1pet2:5 "you also, like living stones, are being built into a spiritual house to be a holy priesthood, offering spiritual sacrifices acceptable to God through Jesus Christ."
If people want to be restored then they need to take their priesthood serious and live Holy before God.
Heb 11:14 "Make every effort to live in peace with everyone and to be holy; without holiness no one will see the Lord."