When European style central libraries were first established, they were actually legally mandated copyright holding libraries, as in they were an arm of the government that was entitled to copies of any work published, regardless of authorship and licensing. The library had a perpetual legal "copyright" codified in law to any works produced by any author, and had the legal power to acquire, buy, and make copies themselves of any works that needed to be archived. They were authorized scribing/photocopying centers so to speak. Modern day libraries have shed much of their powers, but those powers are why we have access to historical texts in libraries today (instead of them being destroyed and lost in history).

In light of archivalship being a money loosing proposition for private corporations, it seems that we have the need for an internet/online library to have the right to copy/hold the entire internet in perpetuity for the use of future humankind - that's the mandate of the Internet Archive, and it would be great to see that codified in a UN resolution, for example.