The knowledge of old hasn't dissapeared

I've always felt that with the disappearance of civilisations, library, geniuses and their work, dogmatism, etc. a huge amount of knowledge that would be beneficial today had been lost.

That is until recently.

I realised a couple of months ago during a small epiphany that such knowledge was not lost but existed in myth, stories, behaviour, etc. waiting to be rediscovered. The reason it seems to have disappeared is that it is hard work to discover it. Harder than trying to think anew.