When a lawmaker is said to be needed for every law, the result is an endless series, since someone must be the lawmaker of the lawmaker's laws. Because such a series is uncomfortable to moral philosophers and theologians, at some point they declare that "the buck stops here." They argue for an ultimate lawmaker, one who has no one who makes laws for him. And how is that done? The point is made that the buck has to stop somewhere, and a supernatural god is thought to be as good a stopping place as any.
But still the question can be asked: "From where does God get his (or her) moral values?" If God gets them from a still higher source, the buck hasn't stopped, and we are back to our endless series. If they originate with God, then God's morals are made up and hence arbitrary. If analogy is to be used to establish God as a source of morals because all morals need an intelligent moral source, then, unfortunately for the theist, the same analogy must be used to show that, if God makes morals up "out of the blue," God is being just as arbitrary as are human beings who do the same thing. As a result, we gain no advantage and hence are no more compelled philosophically to obey God's arbitrary morals than we are to obey the morals established by our best friend or even our worst enemy. Arbitrary is arbitrary, and the arbitrariness is in no way removed by making the arbitrary moralizer supernatural, all-powerful, incomprehensible, mysterious, or anything else usually attributed to God. So, in this case, if God exists, God's values are just God's opinions and need not necessarily concern us.
While this first assumption — the need for a lawmaker — fails to solve the problem which it was intended to solve, the second assumption — that the source of moral values must lie outside of human beings — actually stands in the way of finding the answer. The second assumption is based upon the superficial awareness that laws seem to be imposed upon us from without. And from this it follows that there needs to be an external imposer of morality. But what is so often forgotten is that those human laws that appear externally imposed are actually, at least in the Western world, the product of a democratic process. They are the laws of the governed. And, if it is possible for people to develop laws and impose those laws upon themselves, then it is possible to do the same with morality. As in law, so in morals; the governed are capable of rule.