Stephen J. Pyne is a fire historian, urban farmer, and emeritus professor at Arizona State University. He spent 15 seasons with the North Rim Longshots, a fire crew at Grand Canyon National Park. Out of those seasons emerged a scholarly interest in the history and management of fire, with major surveys for America, Australia, Canada, Europe (including Russia), and the Earth. From that career, Pyne has developed the notion of a Pyrocene, a human-driven fire age.