12Therefore, just as sin entered the world through one man, and death through sin, and in this way death came to all men, because all sinned— 13for before the law was given, sin was in the world. But sin is not taken into account when there is no law. 14Nevertheless, death reigned from the time of Adam to the time of Moses, even over those who did not sin by breaking a command, as did Adam, who was a pattern of the one to come.
15But the gift is not like the trespass. For if the many died by the trespass of the one man, how much more did God’s grace and the gift that came by the grace of the one man, Jesus Christ, overflow to the many! 16Again, the gift of God is not like the result of the one man’s sin: The judgment followed one sin and brought condemnation, but the gift followed many trespasses and brought justification. 17For if, by the trespass of the one man, death reigned through that one man, how much more will those who receive God’s abundant provision of grace and of the gift of righteousness reign in life through the one man, Jesus Christ.
18Consequently, just as the result of one trespass was condemnation for all men, so also the result of one act of righteousness was justification that brings life for all men. 19For just as through the disobedience of the one man the many were made sinners, so also through the obedience of the one man the many will be made righteous.
20The law was added so that the trespass might increase. But where sin increased, grace increased all the more, 21so that, just as sin reigned in death, so also grace might reign through righteousness to bring eternal life through Jesus Christ our Lord.
Here Paul outlines the basics of the “Original Sin” doctrine of Christianity. The entire point that Jesus was sacrificed. It seems as though Paul thought that there was a literal Adam. The one man through whom all sin and death entered the world. Paul’s argument can only make sense if there was a literal “first human being” since he juxtaposes it with how the other “one man”, Jesus, nullified Adam’s transgression of bringing death into the world.
Unfortunately, the existence of a literal Adam is impossible. The Christian creation story is absurd, and doesn’t answer why death “entered” the world.
If Adam and Eve couldn’t die before getting kicked out of Eden, then you’re left with a ridiculous situation. Why do we get hungry? Because we are dying. If Adam couldn’t die, then he couldn’t have possibly gotten hungry. This means that Adam must not have had a digestive system. No esophagus, no stomach, no gall bladder, no small intestine, no large intestine, no rectum, no anus. Since he didn’t have any of that stuff, then there’s really no reason for a circulatory system either. So no blood.
If he had no blood then there’s no purpose for having lungs. This makes “sense” (lol) since Adam couldn’t die. Therefore he couldn’t have ever suffocated or drowned before the Fall.
What you’re left with is some sort of inhuman homonculous Adam that is simply filled with smaller “Adams” until you get to a G. I. Joe sized Adam that is filled with creamy nougat.
Even if I grant [you] that Adam got hungry, this still necessitates death being in the world prior to the Fall. Creationists like to claim that every animal prior to the Fall was a vegetarian. But this really betrays their ignorance of basic biology. Plants are alive. In order to eat them, they have to die. Therefore, “death” was in the world prior to the Fall if life forms got hungry.
Even if I allow all of this nonsense to be granted as true, you’re still left with a nonsense situation. Death enters the world because of sin. In order for there to be sin, there has to be this great, awesome, gift of free will. This gift of free will is so awesome, that god refuses to transgress it to prevent suffering.
So we have free will > sin > death.
So once we get to heaven, there’s ostensibly no death. But if there’s no death – and the only reason why there’s death in the first place is because of sin – then there’s no sin in heaven. But if there’s no sin in heaven, then there must not be free will in heaven. Since free will is the only reason why sin exists, right? Therefore when you get to your heaven, you are simply some sort of godbot without a soul. This great, awesome gift of free will isn’t so awesome once you’re in heaven.
All around, the Christian doctrine of “Original Sin” is patently absurd. If there was no literal Adam, then the first major premise of Christianity – as argued by Paul in Romans 5 – is done away with; and Jesus’ death makes no sense.