A lot of the heroin that is consumed in the streets of the American cities has been made with the poppy that grows in the inhospitable hills of the Naa Savi communities of Cochoapa el Grande (Guerrero). Here, the army does not arrive. Neither the state. That is why the neighbors form their own police, create their own schools and keep their traditions alive. In recent years, the price of opium gum has fallen and more and more hectares are necessary to make the crop profitable.