In the film of HG Wells the Time Machine (1960 version) the future Eloi are questioned about text books to build a new civilization the Time Traveler is told "We have books."---- but he finds they are all in crisp brown page, crumbling condition and unreadable.
When he tries to figure out how mankind degenerated into this condition we could tell him people who destroyed education and stilled our freedoms such as freedom of thought and speech destroyed it in our times.
Let's see a new civilization based on only on the knowledge from Snoop Dogg types and the rap songs and ebonic slang to carry on. And no bridges,architecture for more than one story buildings, medicine, computer or cell phone technology or electric power production.