Two loggers, part of a team of people who had a license to cut down trees in the Peruvian Amazon, have been killed by bow and arrow after they allegedly encroached too far into land inhabited by the largest uncontacted tribe on the planet, the Mashco Piro. The tribe have lived on the land for years – surviving a traumatic history of massacres and enslavement. The Mashco Piro number little over 750 people, but their habitat and lives are increasingly under threat from the encroaching loggers around them. In Perspective, we spoke to Teresa Mayo, Researcher and Advocacy Officer at the human rights organisation Survival International.