[full list includes Al Gore, Barack Obama, Anita Roddick, John Elkington, Muhammad Yunus, Kofi Annan, Simon Zadek, Tom Rotherham, Peter Utting, Bill Gates, Paul Hawken, Ray Anderson, C.K. Prahalad, Mary Robinson, Nelson Mandela, Richard Welford, Amartya Sen, Jane Nelson, Vandana Shiva, Georg Kell, Wangari Maathai, Aron Cramer, Geoffrey Chandler]