Dear Jens
I like your essay, it is well written, organized and easy to read. Your ideas are clear and fluent. The idea is original and appears to be a good idea for a united world. However, I see some inconveniences that may not help to achieve the goal you pursue.
First thing. Not all knowledge should be made public. For obvious reasons.
The second is that knowledge has different levels and it won't be interesting for an advanced reader, to read introductory knowledge. And similarly, beginners will not understand advanced knowledge.
So, knowledge must be divided according to needs and levels.
Wikipedia is introductory and intermediate level. Schoolarpedia is for advanced readers.
The other problem is how to store all this knowledge. We now have the fortune of storing massive knowledge in magnetic form, but as far as I know, magnetic information cannot be stored for centuries. Magnetism is naturally lost after about 8 o 10 decades. Knowledge engraved in a stone last much longer than any other mother method.
In your essay, you mention that: The repository must therefore not only be robust against man-made or natural disasters, it must also provide the means for accessing and copying digital data without computers, data connections, or even electricity.
Do you have an specific idea on how to store massive knowledge other than magnetic tapes?
Thanks in advance. I'd like to take the opportunity to invite you to read essay and comment on my thread. There I discuss what should be the ideal that should steer the future and discuss our major problems.
Best Regards
Israel