Well, there's the question of the cause of our moral and legal systems, and then there's the question of their justification. Perhaps they have only causes and no satisfying justifications. We call them good if they do what we want (if they produce a peaceful, safe, and fair world), which raises the question of whether our desires are good.

If causes trump justifications, we're in danger of succumbing to a subversive, philosophical perspective with which we'd see through our noble lies. I think of that perspective as the dawning of a transhuman mentality, of a Luciferian, godlike worldview that will be forced on us by technological and scientific progress. Whether we can handle it is another story.