The science of morality may refer to various forms of ethical naturalism grounding morality in rational, empirical consideration of the natural world.
Moral science may refer to the consideration of what is best for, and how to maximize the flourishing of, either particular individuals or all conscious creatures. It has been proposed that "morality" can be appropriately defined on the basis of fundamental premises necessary for any empirical, secular, and philosophical discussion and that societies can use the methods of science to provide answers to moral questions.
In sum, from the perspective of neuroscience and brain evolution, the routine rejection of scientific approaches to moral behavior based on Hume’s warning against deriving ought from is seems unfortunate, especially as the warning is limited to deductive inferences. The dictum can be set aside for a deeper, albeit programmatic, neurobiological perspective on what reasoning and problem-solving are, how social navigation works, how evaluation is accomplished by nervous systems, and how mammalian brains make decisions.