One of the recent attempts to formulate a general theory of nationalism has been Deutsch's approach to the question. This aims to show that a correlation exists between changes in the process of social communications and the rise of national consciousness. A considerable number of studies based on this approach to nationalism will have to be carried out before its contribution to the identification of the elusive “essence” of nationalism can be evaluated with any amount of fairness. In the meantime one tentative procedure which might be used to assess its usefulness is to try to fit this model to the evolution of social communications in a number of countries which the author has not included among his illustrations.