Dr. Mathis Wackernagel, Chief Executive Officer of Global Footprint Network, co-created the Ecological Footprint as his PhD with his advisor Dr. Bill Rees in the early 1990s. Global Footprint Network is an international think-tank focuses on bringing about a sustainable human economy in which all can thrive within the means of one planet. Mathis’ awards include the Blue Planet Prize, the Zayed International Prize for the Environment, and the Skoll Award for Social Entrepreneurship.