Charles Ellicott Commentary Romans 5:17

"For if, by the trespass of the one, death reigned through the one; much more shall they that receive the abundance of grace and of the gift of righteousness reign in life through the one, [even] Jesus Christ." — Romans 5:17 (ASV)

Further confirmation of the contrast between the effect of Adam’s sin and the atonement of Christ. The one produced a reign of death; the other shall produce a reign of life.