Matthew J. Hoffmann is an Associate Professor in the Department of Political Science at the University of Toronto and Co-Director of the Environmental Governance Lab at the Munk School of Global Affairs. He is the author of Climate Governance at the Crossroads: Experimenting with a Global Response after Kyoto (2011) and Ozone Depletion and Climate Change: Constructing a Global Response (2005) and co-editor of Contending Perspectives on Global Governance (2005, with Alice Ba).