C.S. Lewis’ objective stance on ethics is argued to be superior to the moral sentimentalism of David Hume, because if there is not agreement on what constitutes moral action, then there is no basis for argument over the existence of moral law.
Steiner, L. (2018). "Logos I - Philosophy and the Nature of Morality: The Abolition of Man, C.S. Lewis," Aristos 4(1),. https://doi.org/10.32613/aristos/2018.4.1.1