Extending the constructivist approach to nationalisms and the culturalist view of the modern state to a transnational context, illuminates the political and bureaucratic construction of ethno-national populations beyond the territorial boundary of the state. Through a comparative analysis of transborder membership politics in the colonial, Cold War, and post-Cold War periods, the book shows how the configuration of geopolitics, bureaucratic techniques, and actors' agency shapes the making, unmaking, and remaking of transborder ties. Kim demonstrates that being a "homeland" state or a member of the "transborder nation" is a precarious, arduous, and revocable political achievement.