I suspect our nations historical declining personal knowledge reservoir will be found to be directly related to the declining reading of books.
That may not prove causation itself here, but IMO it's a great indicator.
Maybe even worse is the utter lack of desire to learn anything that helps to reduce the odds of repeating history.
Thats plainly evident by how few simply ask any questions. Nobody can ever know enough history.
I have no clue how to fix that mindset.