What does the Bible say about Adam's role in original sin?

Adam's role in original sin is foundational to Reformed theology and is explicitly addressed in Romans 5:12, which teaches that sin entered the world through one man, leading to death for all. Adam served as humanity's representative, and his failure in the Garden of Eden resulted in a sinful nature inherited by all his descendants. This doctrine underscores the gravity of sin and the necessity for redemption through Christ, who reverses the curse that Adam's actions introduced. Understanding Adam's sin is essential for grasping the profound implications it has on the human condition and the narrative of salvation history.