I argue in this paper that moral realism is more likely to be true if God exists than if God does not exist. I will first argue that, without the existence of God, objective moral facts would be queer, but that the queerness problem is solved if God exists. I will then go on to argue that no being could be God unless that being has authority over all created rational beings just as morality does, which explains why the existence of God is relevant to metaethics.
Luke Taylor (Tue,) studied this question.
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context: