Simon Retallack is Associate Director and Head of Climate Change at ippr, the UK's leading independent progressive think tank, where he leads a programme of research on UK and international climate change policy. He is also founder of the Global Climate Network, a collaboration of influential research and policy organisations in countries key to tackling climate change, aimed at addressing the constraints faced by national governments in agreeing international action. Previously, Simon led research for the International Climate Change Taskforce, which provided advice to the UK Government for its presidency of the G8 in 2005. He has also been co-director of the Climate Initiatives Fund, a grant-making programme on behalf of members of the Goldsmith family, and Commissioning Editor of The Ecologist magazine. He is also the author of a number of publications, including the prize-winning book STOP.