What explains the timing of the liberalization of citizenship laws? Although scholars have offered a number of competing explanations for differences among citizenship regimes, few have examined the timing of liberalization and retraction of rights for non-citizens. To investigate the timing of both liberalization and reversal, this study examines the historical expansion of voting rights for non-citizen residents (VRA). Given both the symbolic and substantive consequences of VRA, democracies may proceed slowly when liberalizing political rights and may retract them quickly. Two bodies of scholarship offer competing explanations. The “national resilience” thesis suggests that differences in cultural definitions of citizenry, political institutions, and social policies produce national citizenship regimes that evolve slowly. By contrast, the “policy constraints” thesis asserts that domestic institutions enact human rights norms that expedite convergence around a common set of political rights. This study t...