Nineteenth-century European intellectual history has given rise to such varied and abundant research that one is surprised to find certain important problems long identified and yet still relatively unexplored. Such is the case for certain aspects of the crucial transition from Hegel to Marx, for minority tendencies among French socialists and for the Messianic phenomenon, national and religious, so central to the period, particularly in Eastern Europe, and so rarely studied in detail. Certainly, these lacunae are exemplified by the absence of any com prehensive work on August Cieszkowski...