The Hartwell Paper called for a reorientation of climate policy after the perceived failure in 2009 of the UNFCCC climate conference in Copenhagen. It was a response to the United Nations' Kyoto Protocol, a previous international agreement meant to reduce greenhouse gas emissions. The paper was published in May 2010 by the London School of Economics in cooperation with the University of Oxford. The authors are 14 natural and social scientists from Asia, Europe and North America, including Mike Hulme, Roger A. Pielke (Jr), Nico Stehr and Steve Rayner, who met under the Chatham House Rule.