So that the more thoroughly the slaves, women etc. are indoctrinated to accept the prevailing Spartan or Taliban norms, the "better" the society becomes. Does that also match your concept of moral progress?
Well, is the indoctrination reversible? i.e., could those people to reject Spartan or Taliban norms if they heard the right arguments, as happened to Lukeprog? (Which suggests to me a heuristic to tell which of two memeplexes is closer to the CEV of humanity: is the fraction of adult A-ists who convert to B-ism per year larger or smaller than the fraction of adult B-ists who convert to A-ism?)
Perhaps a superintelligent mind could create an argument that would convince any human of any belief. Why should such an ability have moral implications?
Here's the new thread for posting quotes, with the usual rules: