What unites political associations? And what are fair criteria for conceding or denying access to citizenship to potential immigrants? This article argues that the socio-political conditions for the unity of political associations should be distinguished from the merely institutional functions of statehood. Focusing on conditions for the unity of political associations, the article critically examines traditional and contemporary ideas about the unity of the people in liberal political theory. Starting with a brief historical sketch of Hobbes' (states make peoples) and Rousseau's (the people is the state) accounts of the unity of the people, the major argument examines the conditions of democratic unity and especially conditions for the acc...