When the Roman Empire fell, the literacy rate among the people fell significantly, as far as I know. We know as a historical fact that the fall of the Roman Empire as a political entity was coeval with the disintegration of the Latin language into the multitudinous Romance language in both the spoken and the written word.
Do you think that if the literacy rate decreases below a certain threshold in a population dispersed over some geographical region and initially speaking and writing (by no means universal) a common language, with the added condition that this region as a whole becomes divided into subregions whose inhabitants interact mostly among themselves and rarely with inhabitants of other such regions, that such a disintegration along the lines of what happened to the Latin language is more or less inevitable?
Conversely, do you think that there is any merit to the inverse statement, namely, that if the literacy rate remains high throughout a given period of time in a given geographical space, that the written and spoken language will be preserved, or at least slowed down in its rate of evolution?
Finally, do you think that there is any validity in comparing what supposedly happened to the descendants of the survivors of Noah’s flood and what happened after the collapse of the Roman Empire, at least in their commonality that there was a “confounding of the languages”? Also, if the flood indeed happened as the account thereof in Genesis said it did, would such a confounding of the languages be a reasonable consequence (I am assuming that “literacy rates” fell for the survivors)?