"There may be few instances in which the superstition that only measurable magnitudes can be important has done positive harm in the economic field: but the present inflation and employment problems are a very serious one."

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If the resources of different nations are treated as exclusive properties of these nations as wholes, if international economic relations, instead of being relations between individuals, become increasingly relations between whole nations organized as trading bodies, they inevitably become the source of friction and envy between whole nations.

— Friedrich August von Hayek