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06636_Field_TCUM T201.txt
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they felt the need to become centres themselves, with their
own margins. This is the time when the original centre may
make a more rigorous effort of centralized control of the
margins, as, indeed, Great Britain did. The slowness of sea
travel proved altogether inadequate to the maintenance of so
extensive an empire on a mere centre-margin basis. Land
powers can more easily attain a unified centre-margin pattern
than sea powers. It is the relative slowness of sea travel that
inspires sea powers to foster multiple centres by a kind of
seeding process. Sea powers thus tend to create centres
without margins, and land empires favor the centre-margin
structure. Electric speeds create centres everywhere. Margins
cease to exist on this planet.
Lack of homogeneity in speed of information movement
creates diversity of patterns in organization. It is quite