Opposing music “Nice guys finish last” (Good youngsters arrive finally, in free translation), of the United States band Green Day, scientists affirms that good young men are yes attractive to the Studies show that aggressive men do not conquer more women of what most pacific. The study for the university of the state of the Pennsylvania, led for professor Stephen Beckerman was made, on the basis of the Waorani community in the Equator. This is one of the communities most aggressive in the world. For this reason, the waited result was that the men in good ways were passed stop backwards. But the result was contrary, exactly inside of this community known for being so aggressive with the people of is - as many men as women - as of inside. The men less aggressive had more wives and a more lasting ancestry. However previous studies on the Ianomâmis, that inhabit Venezuela and Brazil, possess resulted that they conflict with the ones of Beckerman. The Ianomâmis is part of an aboriginal tribe who inhabits in the Amazônia whose culture, if believes, to be most primitive in the world. It was observed that in this tribe the men who kill more, possess more wives.