Thanks Christy for these comments, which allow me to show that my explanation does not run in the theological problems of @Swamidass Genealogical Adam and Eve (GAE).
According to my explanation God provided that human beings in the image of God and ordered to the gift of eternal life NEVER lived together with Homo sapiens creatures that were not in the image of God and ordered to the gift of eternal life. Accordingly, I state:
Any Homo sapiens creature, who came to live together with the descendants of the “specially created couple” (A&E), by this very fact became a human being specially created in the image of God the same way as A&E were.
The reason is that God wanted to fill the earth with humans that live loving and respecting each other and ordered to the gift of eternal life. To this aim family life and education was crucial. A family where the father (descendant of A&E) would be ordered to go to heaven and the mother (non-descendant from A&E) would NOT (as GAE assumes), would not be fitting to the task of educating the children (genealogical descendants of A&E) “to work as stewards and ambassadors in God’s kingdom, promoting his justice and peace on earth”, and ordered to eternal life. Such a family would really be a strange family!
I would like to stress that:
If in GAE one assumes that both parents are always ordered to the gift of eternal life, GAE becomes equivalent to my explanation, at the end of the day.
(Notice also that I prefer to assume that A&E was “a specially created little population” rather than “a single couple”, but this is not relevant for this discussion so far).
As I have discussed in other posts, the passage of Genesis 6:2-4 referring to the “sons of God” supports my statement above.
As regarding “how the fall/original sin affects everyone”, my explanation runs as follows:
God desired “the harmonious flourishing of humankind” and endowed A&E (whether “single couple” or “couple of couples” it doesn’t matter) with special original grace to totally master the inherited evolutionary selfish urges, so that at the very beginning A&E were completely free of sinful propensities (“concupiscence”).
After their first sinful choice A&E lost this special original grace, and as a result the inherited evolutionary urges became sinful propensities within their hearts. Nonetheless God in his mercy decided to give A&E opportunity to repent and allowed them to remain on earth (instead of throwing them to hell).
Thus, for the sake of redeeming all sinners, the earth was destined by God to be inhabited by people sharing sinful propensities and in need of redemption, according to Romans 11:32 “For God has bound everyone over to disobedience so that he may have mercy on them all.”
In conclusion: The fall/original sin affects everyone coming into existence after the first human sinful choice by A&E, even if he/she is NOT a genealogical descendant of A&E.
For sure, death and violent propensities did already exist before the Fall. However, by definition, they could neither be sinful nor a consequence of the Fall, as the creatures affected by such deficiencies were not ordered by God to the gift of eternal life, and therefore to live loving and respecting each other in transforming relationship with God; in particular, such creatures were not morally accountable for killing each other, the same way as lions and chimps are not accountable today.
By God’s declaration in Genesis 9:4,5-6, after the fall and at the end of the flood, all Homo sapiens became humankind in the image of God. Since this moment each Homo sapiens creature on earth is called to the gift of eternal life, and deserves the status and dignity of being in the image of God, although without the special original grace A&E had at their creation, and therefore submitted to sinful propensities (concupiscence).
I summary, I think that my explanation above:
- Fits well to revelation.
- Cannot be disproven by science.
- And does not run into the theological problems of @Swamidass’ GAE.
I would be thankful to know any further objection you may have in this respect.