Introduction : a focus on migrant inclusion and the politics of immigration and asylum in Europe -- The nation-state and NGOo political activity -- Domestic opportunities and constraints -- Cooperation along two dimensions : public visibility and intensity of commitment -- Asymmetries within the movement : the provision and receipt of less publicly visible movement "goods" -- Cooperation within the state : publicly visible campaigns and common projects -- Cooperation beyond the state : transnational activism in the public realm -- NGOs as multilevel actors : toward a more complete understanding.