Many people through the ages have hypothesised about a 'collective universal conciousness' out there in the ether waiting to be downloaded by the human brain at a certain point of development. All knowledge that has ever existed, every thought, every action and deed right there to be accessed if you have the 'software' enacted in your brain. To me this is a given as many of the visionaries throughout history who have taken the giant steps that changed mankind such as Tesla and Di Vinci would appear to have been able to access information that even today seems incredible.
It would be nice to know that in the time I have left we'll know definitively but sadly I doubt that will be the case.
A thought provoking post dude.
Might not be a definite "we" know as an entire population, in a way that can be put into textbooks - but rather increasing numbers come to know through direct experience, each at their own pace.
Fairly likely such knowledge may come in your lifetime. And some proper psychedelic journeys might surely fastrack parts of the discovery... ;-)