Wikipedia – A New Community of Practice? O'Sullivan discusses the group's aims; its community and make-up; its costs of doing business (transaction costs); its relations with the public; and its legacy. The second part of the book applies the group theory approach to Wikipedia, devoting a chapter to each aspect. Chapter 10, on the structure of Wikipedia, explains the use of "talk pages" and . Chapter 13, "Wikipedia and the Nature of Knowledge," explores the question of expertise. In this chapter O'Sullivan claims a fundamental disagreement between Wikipedia's two founders, Jimmy Wales and Larry Sanger. While Wales, an admirer of the economist Friedrich Hayek, believed in the
Jimmy Wales edited his own biographical entry on the English Wikipedia. Writer Rogers Cadenhead drew attention to logs showing that in his edits to the page, Wales had removed references to Sanger as the co-founder of Wikipedia. Sanger commented that "having seen edits like this, it does seem that Jimmy is attempting to rewrite history. But this is a futile process because in our brave new world of transparent activity and maximum communication, the truth will out." Wales was also observed to have modified references to Bomis in a way that was characterized as downplaying the sexual nature of some of his