The Vanishing Cultures Project is a documentary project that is helping to create awareness of native tribes and preserve their way of life. Taylor Weidman and Nina Wegner team up for half the year and go out to document indigenous tribes. They have already finished their first project about Tibet in the Upper Mustang region. You can purchase prints and a book about Tibet. Right now they are working on documenting the pastoral herders in Mongolia. Check out more about their project here: http://www.vcproject.org
What I really love about the project is not only the preservation aspect, but the photographs. They are truly stunning.