Contributor(s): Professor Saskia Sassen, Professor Ash Amin | In her new book, Expulsions: brutality and complexity in the global economy, Saskia Sassen explores how today’s socioeconomic and environmental dislocations can be understood as a type of expulsion – from professional livelihood, from living space, even from the very biosphere that makes life possible. Saskia Sassen (@SaskiaSassen) is the Robert S Lynd Professor of Sociology and co-chair of the Committee on Global Thought at Columbia University. Ash Amin is the 1931 Chair of Geography at the University of Cambridge. Ricky Burdett (@BURDETTR) is professor of urban studies at the Department of Sociology, director of LSE Cities, and the Urban Age Programme at LSE.