I don't do QOTDs normally. But I want to extract something from the increasingly valuable Billy Beck. I readily admit that it is lacking context so if you don't read the whole thing, shame on you.
"One could perhaps be forgiven for thinking the 20th century's great moral argument had been settled."
Of course, the change does not survive examination against actual history -- nothing about these arguments was ever "settled" -- but that has nothing to do with general ignorance of the fact that the "economic argument" is an argument over consequences of a moral system. It is not fundamental in any way.