The limitation upon this mode of promoting peace lies in the fact that it consists in an appeal to the civilized side of man while war is the product of forces proceeding from man's original savage nature.
I think what the Nobel committee is doing is going beyond war and looking at what humanity can do to prevent war. Sustainable management of our natural resources will promote peace.
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The methods of peace propaganda which aim at establishing peace doctrine by argument and by creating a feeling favorable to peace in general seem to fall short of reaching the springs of human action and of dealing with the causes of the conduct which they seek to modify.