Manuel Castells (b. 1942 in La Mancha, Spain) is a sociologist. Between 1967 and 1979 he taught at the University of Paris, first at the Nanterre Campus, then, since 1970, at the Ecole des Hautes Etudes en Sciences Sociales. In 1979 he was appointed Professor of Sociology and Professor of City and Regional Planning at the University of California, Berkeley. In 2001 he also became a research professor at the Open University of Catalonia, Barcelona. In 2003 he joined the USC Annenberg School for Communication as a professor of communication and the first Wallis Annenberg endowed Chair of Communication and Technology.
Castells lives in Barcelona and Los Angeles, California and is married to Emma Kiselyova.