Early political culture research, in its attempts to determine which combination of attitudes, values and behaviours created the ideal electorate, often treated national identity as a tool of integration. If individuals felt a sense of national identity then the political culture would be in a healthier state than if citizens expressed their loyalty to rival sub-groups or felt no national identity at all. Since these works, little attention has been paid to the role of national identity within political culture. Altered by discussions of post-materialism, mundane political culture or rational choice theories, political culture has abandoned the initial interactive focus of examination to other literatures studying social capital and new social movements. The thesis argues that national identity has remained an under-explored aspect of political culture, and that an integrated approach would benefit analyses of States where nationalist movements have sought greater political autonomy. Relying on case studies of Scotland and Quebec, the thesis examines the way in which national identity is treated by political actors to create a hierarchy of belonging within the nation. Perceptions of national inclusion, as determined by this hierarchy, affect the patterns of interaction within the political culture. The sense of ease with which people feel integrated in the political system is not currently explored by surveys of trust, efficacy, satisfaction and confidence. Relying on survey data and qualitative interviews, the thesis seeks to demonstrate that the way in which individuals draw boundaries around themselves, their nations and political systems forms an integral part of political culture.