Describing the effect that Adam’s disobedience had on all of us, his descendants, the Bible explains: “Through one man [Adam] sin entered into the world and death through sin, and thus death spread to all men because they had all sinned.” (Romans 5:12)
... It also says: “Just as through the disobedience of [Adam] many were constituted sinners, likewise also through the obedience of [Jesus] many will be constituted righteous.”—Ephesians 1:7; Romans 5:18, 19; Matthew 20:28.