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0463 The Pulse of Asia : vol.1
アジアの鼓動 : vol.1
The Pulse of Asia : vol.1 / 463 ページ(カラー画像)

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doi: 10.20676/00000233
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southern Canada, with the centre of power between latitudes
forty and forty-five.

In explanation of the manifest movement of civilization
from south to north, it has been commonly said that, for
some undefined reason, man's relation to climate has
changed. As he has become more civilized, he has also be-
come adapted to colder and moister climatic conditions.
To put it more fairly, the civilized man of to-day, being
supposedly of a more nervous organization than his pre-
decessor of two or three thousand years ago, finds that his
impulses toward activity and toward self-control are most
perfectly balanced in a fairly moist and cool climate; whereas
the pioneers of civilization found the most favorable condi-
tions in a dry, warm climate. According to a further as-
sumption necessitated by this view, man took the first great
step toward civilization, that is, adopted the pursuit of
agriculture, in arid regions where irrigation was necessary.
It was an easy matter, so it is said, to lead a little water to
a patch of seeded ground which otherwise would have been
unproductive; far easier, indeed, than to clear and cultivate
a similar patch which needed no artificial supply of water,
but was sure to be full of a great variety of plants not wanted
by the sower. To a certain extent these views are perhaps
true, but if our theory of changes of climate is valid, they
require profound modification.

According to the climatic hypothesis of history, as we
may call it, mankind, since first the race gained the rudi-
ments of civilization, has always made the most rapid pro-
gress under essentially the same climatic conditions. The
conditions apparently are that the summers shall have a