Minority nations within multinational States often evolve within a context of great uncertainty when it comes to the protection of their distinctive political and cultural characteristics. While their minority condition in no way limits their existence as nations, it can nevertheless come with a certain feeling of national fragility and even a fear of disappearing. These minority nations, when the State to which they belong refuses to recognize their particularism and to allow them the necessary tools to defend it, can then quickly become fragile nations. In this article, we discuss, define and specify the meaning of the concept of fragile nations, putting the emphasis on its theoretical and normative dimensions.