When the act of navigation was made, though England and Holland were not actually at war, the most violent animosity subsisted between the two nation… - Adam Smith

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When the act of navigation was made, though England and Holland were not actually at war, the most violent animosity subsisted between the two nations. ... It is not impossible, therefore, that some of the regulations of this famous act may have proceeded from national animosity. They are as wise, however, as if they had all been dictated by the most deliberate wisdom. National animosity at that particular time aimed at the very same object which the most deliberate wisdom would have recommended, the diminution of the naval power of Holland, the only naval power which could endanger the security of England.