Is moral truth a priori and not a natural property of the universe? So says Dr. Russ Shafer-Landau (as articulated in Whatever Happened to Good and Evil in 2003; and Moral Realism: A Defence in 2005). Even though I’m sympathetic to his project, he’s just wrong. And not merely wrong, but too obviously wrong for this to still be a thing in 21st century philosophy. Here I’ll explain why I think that. And in the process you’ll get a feel for how to actually think about moral realism, and how to better understand what morality actually is and how a morality is determined to be true.
This connects with a recent and very relevant interview of me on this same issue by J.J. Chipchase at Naturalistic Philosophy, titled On Moral Theory and Truth with Richard Carrier – Part I. There I outline many aspects of my take on metaethics that inform the following.