Abstract
The recent growth of minority nationalist movements poses the conceptual question of the validity of social science theories dealing with national integration, and the practical question of assessing the options open to governments faced with nationalistic agitations and demands for secession. Older theories predicting the decline of ethnic and cultural conflicts have been challenged by the theory of internal colonialism and by a group of theories stressing the durability of ethnic loyalties. The theory of internal colonialism is analyzed and found to be unhelpful. The durability of ethnic loyalties is accepted; four propositions are advanced to explain the growth of minority nationalist movements. It is suggested that this is a rational development in view of recent changes in the international order. Canadian and British experience indicates that it is difficult for governments to prevent demands for secession from arising. However, the growth of interdependence has reduced the significance of secession; this view is supported by a brief analysis of relations between the United Kingdom and the Irish Republic.

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