Since it seems the Overcoming Bias posters are either unwilling or unable to examine the concept of morality more closely, I’ll link to Wikipedia’s discussion of the concept.
The first sense is useless as a tool for understanding. The set of all possible codes of conduct is complete and inconsistent, and being in possession of any particular code chosen at random is arbitrary.
The second sense, however, is somewhat more useful. It’s not clear such a universal morality exists at all – but if it does, it must possess certain properties, given that rational entities are supposed to agree as to its nature. It follows that the code itself would need to be derivable from basic principles, principles that are in common to all things within the universe. Y’know, mathematics, that conceptual branch of physics.
What a shame that humanity has never developed a field of inquiry dedicated to the objective evaluation of different courses of action. It sure would come in useful when trying to understand what behavioral guidelines founded upon universal principles would be like.