Recently I was wandering if there is someone or some group preserving , collecting , organizing and publishing all the knowledge of mankind ever created throughout its existence so that if ever mankind faces the 6th mass extinction we don’t have to reinvent the wheel and can have a kick start to our new post apocalyptic civilization .
Wikipedia is a great start. You can download its entirety, roughly 100gb. Most of the basic and advanced human knowledge.
Check out kiwix to get it offline
You can do all of Project Gutenberg too. It’s only about 75gb, surprisingly.
ASCII text is hella lightweight.