What complex social problem? All I see are a few technical problems regarding security, anonymity, and interrelations between nodes on a graph. There's also a closely related ease of use (ie UX) problem regarding the convenience (or rather lack thereof) of publishing things in a reasonably anonymous manner.

All the social problems, such as the underlying reasons for wanting or needing anonymity in the first place, remain.

It is a social problem because even the strongest, most bullet-proof cryptography solution can't prevent people slipping up and making mistakes, which a motivated attacker can then use to de-anonymize and connect their various identities together.

And people will slip up and make mistakes. A lot.

I agree that the potential for making mistakes could contribute to a social problem, but it's one that already exists. I also wasn't proposing to solve it - hence my earlier response.

“Authorship Attribution” is an active field of research. Even if you manage to solve the problem of anonymously publishing a bunch of content under distinct anonymous pseudonyms (or completely anonymously), there’s a non-negligible probability that, as soon as the author of one work is identified, the entire body of work can be attributed to that person.