Law should not protect people, law should protect virtue; by virtue of this, the virtuous are then protected by law.
This our Founders showed an understanding of, as they attempted (imperfectly, but earnestly) to tie man’s law to Divine virtue. And it is this principle that guides true progress: we do not yet perfectly reflect the Divine virtue in our earthly laws, and so we continue to examine and refine that which we believe should be law. We do not change for the sake of the people’s ever-changing desires, but for the sake of virtue, which assures the people’s highest good.
The Progressive is correct: things need to change.
The Conservative is correct: things need to change in a specific direction.