At the time of the discovery of Brazil by the Europeans, a total of 2,000 indigenous nations, divided into several thousand tribes, existed in Brazil. The total number of native tribes which inhabited present day Brazil at the time of first contact is disputed and difficult to ascertain. The names of large number of tribes who were exterminated as a result of intertribal warfare are not recorded anywhere and so is the case of several smaller tribes who were wiped out by the colonizers. Curt Nimuendajú gives a list of 1,400 nations in his monumental work Mapa etno-histórico do Brasil e regiões adjacentes, but he ignored many smaller (extinct) tribes in Eastern Brazil, and was at the time of writing unaware of some other tribes which were uncontacted at that time. Currently only 200 nations