Over half a million Brazilians are indigenous, and millions more have some Amerindian ancestry, and indigenous influence extends to our culture, food and language. In fact, Tupi-Guarani was the most widely spoken language in Brazil for 200 years, and there are still hundreds of words in Brazilian Portuguese which are derived from this language. Brazil even has the largest number of uncontacted peoples in the world - 67 different tribes.
There are select regions in the world where affluence does not have a hold. The rural, amazonian tribes in South America are one such example. Anthropologists have found that they live quite comfortably, without many superfluous possessions.