Moral code

In one of his widely read books, Mere Christianity, C. S. Lewis maintains that there exists a "universal, cross-cultural moral code that is binding."  It's something that the West doesn't formally teach anymore.

It's universal and cross-cultural because all cultures hold to a similar ethic. When two people have a disagreement about whether one of them has acted unfairly, their argument is based on a standard that is outside either of them, that demands fair play.  Why?

Lewis develops the idea of a transcendent standard, or moral code, in Mere Christianity and in The Abolition of Man.  Louis Markos, professor at Houston Baptist University and Lewis scholar, explains how Lewis presents this moral code as evidence of a supernatural Creator  in the blog Civitate here.