We shall therefore try to simplify matters, and begin by clarifying the two concepts of nationality and of knowledge, in order to define the concept of the "nationality of knowledge." What, then, is the nation? A very intricate question, indeed, over which violent discussions are raging, and all the more passionately because the premises and conclusions of this controversy are never maintained in the peaceful seclusion of abstract speculative theories, but are dragged at every moment in the very midst of the concrete interests of the men themselves who affirm or deny the value of nationalities. So that serious difficulties are encountered every time an attempt is made to determine the specific and concrete content of this concept of the nation, which is ever present, and yet ever elusive. Proteus-like, it appears before us, but as we try to grasp it, it changes semblance and breaks away. It is visible to the immediate intuition of every national consciousness, but it slips from thought as we strive to fix its essence. Is it common territory that constitutes nationality? or is it common language? or political life led in common? or the accumulation of memories, of traditions, and of customs by which a people looks back to _one_ past where it never fails to find itself? Or is it perhaps the relationship which binds together all the individuals of a community into a strong and compact structure, assigning a mission and an apostolate to a people's faith? One or the other of these elements, or all of them together, have in turn been proposed and rejected with equally strong arguments. For in each case it may be true or it may be false that the given element constitutes the essence of a people's nationality, or of any historical association whatsoever. All these elements, whether separately or jointly, may have two different meanings, one of which makes them a mere accidental content of the national consciousness, whereas the other establishes them as necessary, essential, and unfailing constituents. For they may have a merely natural value, or they may have a moral and spiritual one. Our birth-land, which nourished us in our infancy, and now shelters the bodies of our parents, the mountains and the shores that surround it and individualise it, these are natural entities. They are not man-made; we cannot claim them, nor can we fasten our existence to them. Even our speech, our religion itself, which do indeed live in the human mind, may yet be considered as natural facts similar to the geographical accidents which give boundaries and elevation to the land of a people. We may, abstractly, look upon our language as that one which was spoken before we were born, by our departed ancestors who somehow produced this spiritual patrimony of which we now have the use and enjoyment, very much in the same way that we enjoy the sunlight showered upon us by nature. In this same way a few, perhaps many, conceive of religion: they