The Nature of Nature: Examining the Role of Naturalism in Science, “Evolution and Ethics” by Michael Ruse, pg. 855 to 862.[link]
Ruse begins by distinguishing between moral discourse, or that which when discussed becomes a morality. So that the content of moral discourse is ethics. Ethics which come in two flavors; normative or substantive (also called ethics or metaethics). These Ruse equates normal ethics and metaethics to the moral statements of; “Love your neighbor as yourself” and “God wants you to love your neighbor as yourself” which is the content of “what one ought to do” or “why one ought to do what one ought to do” as Ruse puts it.