Tierney claims that it is the anthropologists, film-makers, and journalists themselves who have not only created a false image of the Yanomami Indians based on their own pre-conceived self-serving notions, but in fact have devasted the people they are trying to study by introducing 'germs, steel, and guns'. Tierney in particular attacks noted anthropologist Napoleon Chagnon and geneticist James Neel. As the Amazon.com review states, "Tierney charges that Chagnon himself fomented wars through his tactics of creating false alliances, giving away machetes,and staging scenes in order to substantiate his own belief in male aggression. Even worse, Tierney believes that Chagnon and his mentor, the famous geneticist James Neel, actually started the measles epidemic that decimated up to 20 percent of the tribe's population by administering a contraindicated "dinosaur vaccine" to a highly vulnerable population."