[dleeftink]

> human knowledge of the world

It definitely comprises a fair share, but I think it is a stretch to say Reddit fosters continuous curation of world knowledge. It offers a space for some very particular niches and memetic content, but a lot of human world knowledge is encoded elsewhere, e.g. internal communication channels, personal correspondence, working notes, journals, wiki's, QA-sites or may not even be encoded at all.

World knowledge would also require broader demographics and more non-English language content, as well as other means of communication beyond text-based interactions.