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 regard to towns, but also on the agricultural countryside. There, also, facilities for the more rapid collection of produce mean finally the expansion and coalescence of what were previously economic unities.

Now if while this expansion of the real communities goes on, you keep to the old boundary lines, you will find an increasing proportion of your population straddling those lines. You will find that many people who once slept and worked and reared their children and worshipped and bought all in one area, are now as it were delocalised; they have overflowed their containing locality, and they live in one area, they work in another, and they go to shop in a third. And the only way in which you can localise them again is to expand your areas to their new scale.

This is a change in human conditions that has been a very distinctive event in the history of the past century, and it is still in progress. But I think there is excellent reason for supposing that for practical purposes this change, made by the railway and the motor, this development of local locomotion, will reach a definite limit in the next hundred years. We are witnessing the completion of a great development that has altered the average possible suburban journey in an hour from one of four or five miles to one of thirty miles, and I doubt very much whether, when every tendency of expansion has been reckoned with, this average hour journey will ever get much beyond sixty or seventy miles an hour. A radius of four or five miles marked the maximum size of the old community. A radius of a hundred miles will certainly mark the maximum of the new community.