The Survival website says that the The Yanomami are the largest relatively isolated tribe in South America. They live in the rainforests and mountains of northern Brazil and southern Venezuela. The Brazilian congress is currently debating a bill which, if approved, will permit large-scale mining in indigenous territories. This will be extremely harmful to the Yanomami and other remote tribes in Brazil.
More information here: http://www.survivalinternational.org/tribes/yanomami/wayoflife
If you are an Australian, this process of land-loss and induction into the market economy probably happened to your ancestors. Contrary to what we are told by missionaries, Foreign-Aid organisations and growth economists, hunter-gatherers who retain their territory and make a traditional living from it, never want to be 'developed'. They always resist but ' development' resulting in dispossession, poverty and then overpopulation, is invariably forced upon them.
Let us try to help the Yanomami and the other tribes of South America, as we should all hunter-gatherers, to retain their land and freedom.