The Secret Rulers of the World is a five-part documentary film, produced by World of Wonder Productions and written, directed by, and featuring Jon Ronson. The series of five parts was first shown on Channel 4 on April 2001. The documentary accompanied Ronson's book Them: Adventures with Extremists, which covered similar topics and described many of the same episodes. Both the series and book detail Ronson's encounters following theorists and activists residing outside political, religious, and sociological norms.