Since the beginning of the 1990s, the gradual widening of scientific and policy debates on poverty from a narrow focus on income poverty to a more inclusive concept of social exclusion, has made poverty research both more interesting and more complicated. This transition to a more multidimensional conceptualization of poverty forms the background and starting point of this book. Researchers studying the 'social' and 'spatial' dimensions of poverty have only started to challenge and explore the boundaries of each other's research perspectives and instruments. This book brings together these different bodies of literature on the intersection of spatial and social exclusion for the first time, by providing a state-of-the art review written by internationally-recognized experts who critically reflect on the theoretical status of their research on social exclusion, and on the implications this has for future research and policy-making agendas.