Why is understanding the concept of two Adams important?

The concept of the two Adams—Adam as the federal head of humanity and Christ as the second Adam—is crucial in Reformed thought. Romans 5 draws a stark contrast between these two figures, indicating that by Adam's disobedience many were made sinners, while through Christ's obedience many are made righteous. This theological framework explains our fallen nature inherited from Adam, as well as the transformative grace offered through Christ, who repairs what was broken in the garden of Eden. It underlines the foundational belief that while all are born under sin, those united with Christ receive righteousness and eternal life, radically changing their standing before God.