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
Brazil–Nigeria relations Brazil–Nigeria relations Brazil–Nigeria relations refers to the current and historical relationship between Brazil and Nigeria. Relations focus primarily upon trade and culture. The two nations, one the largest country in Latin America by size, the other the largest country in Africa by population, are remotely bordered across from one another by the Atlantic Ocean. For centuries, Brazil and Nigeria have enjoyed a warmly friendly and strong relationship on the bases of culture (since many Afro-Brazilians trace their ancestry and religious practices to Nigeria) and commercial trade. Nigeria is a major provider of petroleum to Brazil. In September 2008, the Nigerian