Hillary Angelo is an urban sociologist and Assistant Professor of Sociology at the University of California, Santa Cruz. Her research explores the relationship between ideas about nature and urbanization from historical, theoretical, and ethnographic perspectives. She is interested in how ideas about nature are formed, the social conflicts they produce, and how they are deployed to influence the built environment. Her earlier work on the politics of killing birds in New York City examined the social conflicts that erupt when different understandings of “nature” collide in diverse urban environments. Her dissertation examined this relationship at a greater spatial and temporal scale by tracing a century of urban greening in Germany’s Ruhr region. She is currently completing a book manuscript based on the research in Germany, and is also working on two new projects: one on infrastructure and sociology, and the other on the rise and politics of urban sustainability planning. She received her PhD in Sociology from New York University and holds a BA from Vassar College. Before returning to graduate school, she worked for five years with the New York City Department of Parks & Recreation, primarily on issues of participatory design, immigration, and public space use.