Hillary Angelo is an Associate Professor of Sociology at the University of California, Santa Cruz, Director of the Center for Critical Urban and Environmental Studies, and was a Member of the Institute for Advanced Study in Princeton for the 2022-2023 year. Her work offers a social-theoretical perspective on socio-ecological questions through historical and contemporary research on urban greening, sustainability planning and policy, infrastructure, and climate change. She has published widely in leading scholarly and public venues including Nature, The Annals of the Association of American Geographers, Theory and Society, and Harper’s Magazine, and her first book, How Green Became Good: Urbanized Nature and the Making of Cities and Citizens, was published in 2021 by the University of Chicago Press. She is currently writing a book on public lands and the energy transition, which treats America’s public lands as a key site to ask and answer questions about climate crisis, social crisis, and paths of social change in the 21st century.