DIFFUSION OF GREAT CITIES
characteristic of navigable waters. It might seem as though the state of affairs in China, in which population has been concentrated about densely congested "million-cities," with pauper masses, public charities, and a crowded struggle for existence, for many hundreds of years, was merely to be extended over the whole world. We have heard so much of the "problem of our great cities"; we have the impressive statistics of their growth; the belief in the inevitableness of yet denser and more multitudinous agglomerations in the future is so widely diffused, that at first sight it will be thought that no other motive than a wish to startle can dictate the proposition that not only will many of these railway-begotten "giant cities" reach their maximum in the commencing century, but that in all probability they, and not only they, but their water-born prototypes in the East also, are destined to such a process of dissection and diffusion as to amount almost to obliteration, so far at least as the blot on the map goes, within a measurable further space of years.
In advancing this proposition, the present writer is disagreeably aware that in this matter he has expressed views entirely opposed to those he now propounds; and in setting forth the following body of considerations he tells the story of his own disillusionment. At the outset he took for granted—and, very naturally, he wishes to imagine that a great number of other people do also take for granted—that the future of London, for example, is largely to be got as the answer to a sort of rule-of-three sum. If in one hundred years the population of London
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