Reporting of child pornography images on Wikimedia Commons 2006 he founded Citizendium, a competitor to Wikipedia. While Sanger has gone on the record that this was not an attack on Wikipedia, nor a way to boost readership of his own free web-based collaborative encyclopedia, there is a significant level of skepticism that Sanger acted without malice. Sanger has had an antagonistic history against Wikipedia since leaving, including criticism of Wikipedia co-founder Wales, and of the Wikipedia community: "The ... community had essentially been taken over by trolls to a great extent. That was a real problem, and Jimmy Wales absolutely refused to do anything about it." Fox News
The Wikipedia Revolution Lih describes the importance of early influences on Wikipedia including Usenet, Hypercard, Slashdot, and MeatballWiki. He also explores the cultural differences found within sister projects such as the German Wikipedia, the Chinese Wikipedia, and the Japanese Wikipedia. The book also covers the Citizendium project, originally a fork of Wikipedia by co-founder Larry Sanger. There is a foreword by Wales, and an afterword partially created by volunteers through an online wiki detailing the problems and opportunities of Wikipedia's future. The Wikipedia Revolution The Wikipedia Revolution: How A Bunch of Nobodies Created The World's Greatest Encyclopedia is a 2009 popular history book