The postwar period has been marked by a problematization of nations and nationalism: these phenomena, which were previously assumed to be natural products of evolution, have received a growing amount of attention from social theory. First an attempt was made to debunk nationalist constructions, and then a `primordialist' reaction defended the nation. Explanatory theory has however been held back due to vagueness regarding key categories such as culture, agency, rationality and motivations. Nationalism studies must be clearer in its use of (...) these categories, and separate normative and explanatory questions if it is to yield more useful generalizations in the future. (shrink)