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Because the Navigation acts stated that the goods going to and from the colonies had to be brought in on English ships and 75% of the crew had to be English Because the goods had to come in on English ships the owners of English ships made the colonists pay way more because they were the only ones who could take the product to England and then where ...
It was in 1651, during the times of Cromwell that the first of the famous Navigation Acts was passed. The acts in principal stated that no goods grown or manufactured in Asia, Africa or America should be transported to England except in English vessels.