 A citizen is a member of a political community who enjoys the rights and assumes the duties of membership. This broad definition is discernible, with minor variations, in the works of contemporary authors as well as in the entry “citoyen” in Diderot’s and d’Alembert’s Encyclopédie  [1753].[1]  Notwithstanding this common starting-point and certain shared  references,[2]  the differences between 18th century discussions and contemporary debates are significant. The encyclopédiste’s main preoccupation, understandable for one living in a monarchy, was the relationship between the concepts ‘citizen’ and ‘subject’. Were they the same (as Hobbes asserted) or contradictory (as a reading of Aristotle  suggested)?[3]  This issue is less central today as we tend to take for granted that a liberal democratic regime is the appropriate starting-point for our reflections. This does not mean, however, that the concept has become uncontroversial. After a long period of relative calm, there has been a dramatic upsurge in philosophical interest in citizenship since the early  1990s.[4]