Since the mid-70s the economic restructuring of advanced capitalist de
mocracies has revealed the outdated nature of universal social policie
s and the declining representativeness of secure life and family patte
rns. Terms such as ''social exclusion'', ''new poverty'', ''the underc
lass'' have emerged to describe such phenomena. After clarifying the m
ultiple connotations of these terms, the author adopts a pluridimensio
nal, multidisciplinary approach to distinguish the theoretical bases o
f three paradigms (solidarity, specialization and monopoly) to enable
a better understanding of exclusion. She illustrates the paradigms wit
h theories addressing the economic dimension of exclusion before, fina
lly, considering its significance in politics and social policy.