In America, biblical morality was accepted as central to educating the whole person. That is what Noah Webster, author of our Dictionary and founder of a historic university, meant when he wrote "Education is useless without the Bible."
Natural law leaves us late-born followers of the American founders and of MLK, Jr to debate who we are as Americans, which men and women are included, and which God, if any, may have granted us equality.
The absolute justice of God and His unswerving commitment to righteousness are more than abstract qualities. They have concrete manifestations in the way He deals with people and in the manner He dispenses judgment.
According to Christian theology, God reveals Godself most fully in the person of Jesus Christ. As such, it follows that sin is the closet, or the resistance to revealing ourselves fully to God and to others.
Yes Robert George, reason plays a role in deciding natural rights. But if we're going to use reason, let's use real reason, and not lean on our ivy-league credentials to pass off homophobia as genuine rationality.