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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.
The Townshend Acts were four laws, passed by the British Parliament in 1767, that angered colonists in North America. Because the colonists were not represented in Parliament, they thought the passage of the acts was unfair. Like the Stamp Act and the Intolerable Acts, the Townshend Acts helped lead to the American Revolution.