Yanomami A Political History is the definitive study of the role of Western contact in generating disease, war and political strife among the Yanomami, from the slave raiding of the 17th century to the massacre at Haximu in 1993. Ferguson challenges the view of the Yanomami as the "fierce people." He argues persuasively that in the Amazon region, as elsewhere, the influence of expanding neighboring state systems has increased the propensity for violence among tribal peoples.