This article deals with the question of how migration has developed into a
security issue in western Europe and how the European integration process i
s implicated in it. Since the 1980s, the political construction of migratio
n increasingly referred to the destabilizing effects of migration on domest
ic integration and to the dangers for public order it implied. The spillove
r of the internal market into a European internal security question mirrors
these domestic developments at the European level. The Third Pillar on Jus
tice and Home Affairs, the Schengen Agreements, and the Dublin Convention m
ost visibly indicate that the European integration process is implicated in
the development of a restrictive migration policy and the social construct
ion of migration into a security question. However, the political process o
f connecting migration to criminal and terrorist abuses of the internal mar
ket does not take place in isolation. It is related to a wider politicizati
on in which immigrants and asylum-seekers are portrayed as a challenge to t
he protection of national identity and welfare provisions. Moreover, suppor
ting the political construction of migration as a security issue impinges o
n and is embedded in the politics of belonging in western Europe. It is an
integral part of the wider technocratic and political process in which prof
essional agencies - such as the police and customs - and political agents -
such as social movements and political parties - debate and decide the cri
teria for legitimate membership of west European societies.