Nationalism seems a persistent ideology in academia as much as in politics; despite the fact that it has been shown that nationalism is deeply unjust for minorities. A case for national identity is often invoked to supplement liberalism regarding the inner difficulties that liberal theories have to explain their membership, assure stability and produce endorsement. So, it seems that national identity may also be required for justice. While this controversy continues, I argue that a different approach is available. We can (...) define a conception of legitimacy independently from a conception of justice, and then ask what legitimacy requires from our national allegiances. If everything goes well, much of the controversy from justice disappears as we find that the case for cultural nationalism may be illegitimate for liberal democracies. (shrink)