Hayley Stevenson is a senior lecturer in the Department of Politics, at the University of Sheffield. From 2013-2016 she is an ESRC Future Research Leader carrying out research into policy learning and conceptual change within international organisations. Her research is motivated by an interest in enhancing the democratic quality of global governance, which involves questioning which voices are represented in planning and decision-making and how organisations make themselves accountable to affected people. She has authored two monographs on global climate change politics: Institutionalising Unsustainability (University of California Press, 2013), and Democratizing Global Climate Governance (with John S. Dryzek, CUP, 2014). She has also published numerous articles in journals including Review of International Studies, Environmental Politics, and Critical Policy Studies.