European Union (EU) citizenship is both about a legal status - a set of civil, social, economic and political rights complementing one's national citizenship - and about being an active participating member of the EU political community. EU citizenship includes therefore influencing decisionmaking on rules, policies and practices that effect one's own national and local societies. The opportunities and capacities to exercise these rights and to participate differ between countries, between groups and in time. Social, cultural and economic trends, national or regional crises, as well as national and EU policy responses to these trends and crises, create potentially new inequalities, new barriers, but possibly new opportunities too. Although we cannot predict the future, we can prepare ourselves for different thinkable futures. Through this study we intend to feed the discussion on what might happen with EU citizenship in different circumstances. Moreover, by doing so we also want to stimulate the discussion on what repertoires of action by which actors in what circumstances might protect, foster or boost EU citizenship in these alternative futures.