Book Review Symposium Introduction people’. With the example of Viktor Orbán’s Hungary, Kovács’ shows how ethnonationalist populist governments use external ethnic citizenship and preferential naturalisation regimes to ‘reinterpret the concept of citizenship and make non-residential ethnic citizenship central to their citizenship politics’. 19 She thereby convincingly underlines Shaw’s argument that populism constitutes a serious challenge to the idea of constitutional citizenship. All four contributions highlight how Shaw’s analysis of constitutional citizenship adds to the ongoing debates and challenges in the fields of citizenship and statelessness studies. The questions Shaw raises in The People in Question will certainly inform future discussions about the definition of membership, the formation of statehood, the ideas of peoplehood and the exclusions from these concepts in the form of non-citizenship and statelessness. 19 ibid 394. 371