Furthermore, as I have already said, Pan-Arabism is interwoven with the non-racial concepts of Pan-Islamism and "Pan-Islamic Nationalism." This latter concept may seem a rather grotesque contradiction of terms. So it may be to us Westerners. But it is not necessarily so to Eastern minds. However eagerly the East may have seized upon our ideas of nationality and patriotism, those ideas have entered minds already full of concepts like Islamic solidarity and the brotherhood of all True Believers. The result has been a subtle coloration of the new by the old, so that even when Moslems use our exact words, "nationality," "race," etc., their conception of what those words mean is distinctly different from ours. These differences in fact extend to all political concepts. Take the word "State," for example. The typical Mohammedan state is not, like the typical Western state, a sharply defined unit, with fixed boundaries and full sovereignty exercised everywhere within its frontiers. It is more or less an amorphous mass, with a central nucleus, the seat of an authority which shades off into ill-defined, anarchic independence. Of course, in the past half-century, most Mohammedan states have tried to remodel themselves on Western lines, but the traditional tendency is typified by Afghanistan, where the tribes of the Indian north-west frontier, though nominally Afghan, enjoy practical independence and have frequently conducted private wars of their own against the British which the Ameer has disavowed and for which the British have not held him responsible. Similarly with the term "Nationality." In Moslem eyes, a man need not be born or formally naturalized to be a member of a certain Moslem "Nationality." Every Moslem is more or less at home in every part of Islam, so a man may just happen into a particular country and thereby become at once, if he wishes, a national in good standing. For example: "Egypt for the Egyptians" does not mean precisely what we think. Let a Mohammedan of Algiers or Damascus settle in Cairo. Nothing prevents him from acting, and being considered as, an "Egyptian Nationalist" in the full sense of the term. This is because Islam has always had a distinct idea of territorial as well as spiritual unity. All predominantly Mohammedan lands are believed by Moslems to constitute "Dar-ul-Islam,"[167] which is in a sense the joint possession of all Moslems and which all Moslems are jointly obligated to defend. That is the reason why alien encroachments on any Moslem land are instantly resented by Moslems at the opposite end of the Moslem world, who could have no possible material interest in the matter.