The Mapuche people of southern Argentina and Chile have long protested the loss of ancestral lands at the hands of the colonial-era settlers. The settlers followed Spanish conquistadors down the spine of South America in the 16th century, territory that nowadays is dominated by vast privately owned estates and huge timber plantations. Campaigners say the plantations have left the region environmentally depleted and the indigenous inhabitants mired in poverty. Recently, these simmering resentments have been coming to the boil. People & Power sent filmmakers Glenn Ellis and Guido Bilbao to investigate.