Will Steffen is an Earth System scientist. He is a Councillor on the publicly-funded Climate Council of Australia that delivers independent expert information about climate change. He is also an Emeritus Professor at the Australian National University (ANU); Canberra, a Senior Fellow at the Stockholm Resilience Centre, Sweden; and a member of the Anthropocene Working Group. From 1998 to mid-2004, Steffen was Executive Director of the International Geosphere-Biosphere Programme, based in Stockholm. His research interests span a broad range within Earth System science, with an emphasis on sustainability and climate change.