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Bolded Info:The Navigation Laws were the most famous of the laws to enforce mercantilism. The first of these was enacted in 1650, and was aimed at rival Dutch shippers who were elbowing their way into the American carrying trade. The Navigation Laws restricted commerce from the colonies to England (and back) to only English ships, and none other.
Four of the acts were issued in direct response to the Boston Tea Party of December 1773; the British Parliament hoped these punitive measures would, by making an example of Massachusetts, reverse the trend of colonial resistance to parliamentary authority that had begun with the 1765 Stamp Act.