The first keyword, Welfare State, sets out to problematise the term itself. The welfare state is a national construct, a ‘national social state’ as Etienne Balibar calls it. Thus, transnational or global migration is often construed as a disruptive force, potentially destabilising the welfare state and the nation. This keyword entry critically examines common conceptions of what the welfare state should provide. It delineates some of the ways that migrants (and, more broadly foreign nationals who are not themselves necessarily migrants) are excluded or partially included, with a focus on contemporary EU social policies.