is Professor of Geography at the University of California, Berkeley, where he has taught for 35 years. Walker has written on a diverse range of topics in economic, urban, and environmental geography, with scores of published articles to his credit. In addition to The Atlas of California, he is co-author of The Capitalist Imperative (1989) and The New Social Economy (1992) and has written extensively on California, including The Conquest of Bread (2004) and The Country in the City (2007). Walker has served as Chair of the Geography Department, the Global Metropolitan Studies Center, and the California Studies Center at UC Berkeley, as well as chairing the statewide California Studies Association. He has several prestigious grants to his credit, including Fulbright and Guggenheim Fellowships, along with prizes such as the Carey McWilliams Award for California Studies, a Distinguished Teaching Award at the university, and the Hal Rothman prize in Western History for The Country in the City.