How much can one love a tree? Rajasthan, in northern India, is home to the Bishnoi, a community renowned for the extreme lengths they go to in order to protect nature: Bishnoi men and women have died to defend trees from loggers and wildlife from poachers. Writer and conservationist Martin Goodman, one of few trusted outsiders, relates the history of the Bishnoi, and asks what a world facing climate change and natural disaster can learn from a 600-year-old sustainable community leading an existence in delicate balance with nature and under threat from rapacious modernity. My Head for a Tree offers a timely reflection on indigenous, community-based activism and how we might adjust our lives to fight for the natural world.