deconversionmovement:

¹² Therefore, just as sin entered the world through one man, and death through sin, and in this way death came to all people, because all sinned—

 ¹³ To be sure, sin was in the world before the law was given, but sin is not charged against anyone’s account where there is no law. ¹⁴ Nevertheless, 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 is a pattern of the one to come.

 ¹⁵ But 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! ¹⁶ Nor can the gift of God be compared with the result of one man’s sin: The judgment followed one sin and brought condemnation, but the gift followed many trespasses and brought justification. ¹⁷ For 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!

 ¹⁸ Consequently, just as one trespass resulted in condemnation for all people, so also one righteous act resulted in justification and life for all people. ¹⁹ For 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.

 ²⁰ The law was brought in so that the trespass might increase. But where sin increased, grace increased all the more, ²¹ so that, just as sin reigned in death, so also grace might reign through righteousness to bring eternal life through Jesus Christ our Lord.

Romans 5:12-21

Some portions of this passage are bolded to outline the doctrine of original sin.  The doctrine can be best understood by the words “sin entered the world through one man.”  However, due to the myths of other cultures (i.e. Enuma Elish) and due — in greater part — to the Theory of Evolution, it is fairly simple to conclude that the man of original sin — Adam — did not exist.  It is important to note that there are Christians who no longer accept the Creation myth in Genesis, but still accept the supposed redemptive power of the sacrifice of Christ.  Well, how can one not accept the original sinner, but accept the redeemer?  It’s illogical and thus, Christians who have adjusted their beliefs in such a manner are automatically discredited by the question alone.  On the other hand, there are Christians who still believe the Creation myth to be true.  However, how can they reject the parallels this myth has with that of other cultures?  Moreover, how can they reject the Theory of Evolution — a theory that has substantial evidences in many respective fields of science?

There are only two conclusions:  1)  If there was no original sinner, as the evidence strongly suggests, Jesus Christ died for nothing because there was no original sin due to the absence of an original sinner.  2)  Jesus Christ did not exist because the original sinner did not exist.  If there is no original sinner (the first Adam), then there is no need for a redeemer — “the last Adam” as 1 Corinthians 15:45 would posit.  Ultimately, both conclusions destroy Christianity at its core.  If Christ existed, he died for nothing and the message of salvation is reduced to an abstraction.  If he didn’t exist, then the entire basis of Christianity is ripped from its roots.  This is indeed the final nail in the cross.