Adam’s sin in Genesis 3 was not exclusive to him, but spread to all humanity because we are born from Adam. Therefore, we are all sinners and deserve death. This means that apart from an act of God’s mercy, there is no hope of escaping the punishment for our sin. However, this is why God’s Son (second and eternal person of the Trinity) came to this world as a man: to undo the sin that the first man Adam committed.