Are you saying it is only spiritual death and not physical death that came through sin?
I am trying to be humble about this,

. I am not trying to take either side, but in this point I was saying that Romans 5 is possibly only speaking of spiritual death.
If so, I heartily disagree and actually find this rather shocking.
I have found out a lot of shocking things, but this is because I searched my original beliefs I learned from tradition. Not that they are bad, but I have found that I have changed my views a few times. I still don't know if it is easy to say that Paul is not just speaking of Spiritual death with great confidence.
The first instances of physical death that we see came after the fall.
I agree, except for the fact that plants died, not that that matters for man.
First Cor. 15 speaks of the perishable taking on the imperishable; this includes the physical body. The perishable is part of the result of sin: physical death, that is redeemed and overcome with a bodily resurrection free from age, illness, and death.
I was wondering if you believe that man was created in flesh at the beginning or in the spirit? It seems like your trying to say that man originally didn't come equipped with physical bodies..
If aging, illness, and physical death are not the result of sin, then a large implication of Christ's bodily resurrection is meaningless, and much of 1 Cor. 15 makes no sense.
So if Adam and Eve had a child before sin, then..
(1) he would be a newborn forever
(2) she would have a 30 year old son
(3) there was no reproduction
I really don't understand why Christ's bodily resurrection is meaningless if physical death was part of the garden before sin? I do somewhat see what you are saying, but Paul doesn't really distinguish between spiritual and physical death. If he were to say the sins sting of physical death then this would be a lot easier. He does clearly speak of the need of rebirth or spiritual life to not be stung by death.
The promise of a bodily resurrection to a glorified body is part of the triumph we have in Christ over physical death.
We still physically die. Its just that death doesn't have the spiritual victory as it once did. Everyone dies, but in Christ we only die once then are perfected in glorification. Because of Christ, death isnt eternal and no longer means paying for sin. Im sure you would agree, but I state this understanding so you might show where you disagree.