The secession issue appears to many contemporary thinkers to reveal a fatal flaw in the idea of national self-determination. The question is whether national minorities who come to want to be politically self determining should be allowed to separate from the parent state and form one of their own. Here the idea of national self-determination may lead us in one of two opposing directions. If the minority group in question regards itself as a separate nation, then the principle seems to (...) support its claims: if the Québécois or the Catalans come to think of themselves as having national identities distinct from those of the Canadians or the Spanish, and to seek political independence on that basis, then if we are committed to national self-determination we should support their claims. But we then face the challenge that once national identities begin to proliferate there is no feasible way of satisfying all such claims, given elementary facts of geography and population spread. (shrink)