This essay concerns two forms of moral non-naturalism according to which general moral principles or laws enter into the grounding explanations of particular moral facts. According to bridge-law non-naturalism (BLNN), the laws are themselves partial grounds of the moral facts; whereas according to grounding-law non-naturalism (GLNN), the laws explain the grounding connections that obtain between particular natural facts and particular moral facts. I pose and develop an objection to BLNN concerning moral worth: as compared to GLNN, BLNN has trouble accommodating the common intuition that actions performed out of motivation for rightness de dicto are, at least in paradigm cases, deficient in their moral worth as compared to those performed out of motivation for rightness de re. After presenting the moral worth objection to BLNN, I respond to a possible defense of the view and explain why GLNN is not itself imperiled by an analogous objection. I finally argue that in light of the moral worth objection, a purported analogy between the law and morality fails to give us any reason to prefer BLNN to GLNN. I conclude that non-naturalists who accept the existence of general and explanatory moral principles should adopt GLNN rather than BLNN.
