Actually I agree with your perspective. And historically this was the purpose of Monasteries. To preserve knowledge for the future benefit of cultures after a downfall. I think you are right, it is once again time for these knowledge archives to be preserved. But knowing how to work stone and make fire will be the most useful for the general masses as basic general survival knowledge. The curious leaders will seek out the Monasteries and archives to further their knowledge base and then share it with others after the initial downfall.
Work stone
Make fire.
.
You got me thinking....Ouch.