Core to Wikipedia's operation are the thousands of unpaid editors who spend their time creating and editing articles, citing other sources wherever possible to make the content as reliable as possible.
Some Wikipedia editors do it casually, editing or creating certain articles where they might have some expertise or interest — but there are also some super users.
We've charted the 100 most prolific editors on English language Wikipedia, who between them have made more than 63 million edits to the site.
Top dog is Steven Pruitt, who goes by the username Ser Amantio di Nicolao. He alone has made 4.45 million edits, creating more than 35,000 Wikipedia articles along the way. Handy person to have on your quiz team.