SAM HALVORSEN is a professor in human geography at Queen Mary University of London where he codirects the Center for Research on Latin America and the Caribbean. He is the editor of Latin American Geographies and has published widely in journals such as Progress in Human Geography, Transactions of the Institute of British Geographies, and the Annals of the American Association of Geographers. Halvorsen currently leads a major research project across seven countries: Participation in the City: How Urban Participatory Innovations Are Reshaping Democracy, Governance, and Trust (PAR-CITY). He lives in London.