"What if” biblical questions are difficult because God ordains everything to happen the way they do. We simply can’t say for certain what would have happened if He had ordained it differently. However, we can make some biblically grounded speculations. First, God directly commanded Adam not to eat the tree (Genesis 2:17). The same is not recorded for Eve, implying that Adam was primarily responsible. Second, Paul supports this by arguing that sin and death came through Adam’s sin (Romans 5:12), even though Eve ate first. Third, in other accounts, the husband's sin brought judgment to the family (e.g., Joshua 7:10–26), whereas the wife's did not (cf. Genesis 19:26). Combined, one might speculate that if only Eve had sinned, humanity would not have been cursed. Additionally, it seems likely that only Eve would have been judged with death. What might have happened then would be speculation upon speculation. In the end, Adam did eat, and humanity was cast into corruption and death (Genesis 3:16–19). This is why all sin and why all eternally die outside of repentance and faith in Jesus, the “second Adam” (1 Corinthians 15:45).
Asking a “what if” question is easy...it’s answering it that’s difficult! However, it can be a helpful exercise because it clarifies the importance of biblical history the way God ordained it.
In this case, we learned that sin came through Adam because He, in some way, represented humanity. The problem of sin, then, is more than “someone sinned.” It’s that the head of humanity sinned. That is why we are all born with a sin nature, and why we all die (Romans 5:12–19).
It also explains how one man, Jesus, can save many people. Just like Adam is the representative head of humanity, Jesus is the representative head of all who are in Him—those who have been saved by faith in Jesus (Romans 5:17–19).
Today, humanity can be divided into two groups: those "in Adam" and those "in Christ." We all start in the “in Adam” camp, sharing in his condemnation (Romans 5:19–18) and all headed toward eternal death (Romans 6:23). However, the Father sent His Son Jesus to offer eternal life to all who believe in Him (John 3:16). Therefore, unbelievers are “in Adam” while believers are “in Christ.”
In which camp are you? Who is your head? If it’s still Adam, we encourage you to turn from your sin and confess Jesus as Lord (Romans 10:9–10). When you do, you will no longer be “in Adam” but “in Christ.” Through Jesus, the Father will count you righteous (Romans 4:5) and call you His son or daughter (John 1:12)!