Mercantilism was an economic policy rather than a theory for England. Under this policy, England established rules for its colonies that were meant to benefit England, similar to how a corporation sets rules to benefit itself over its franchises. This included laws requiring colonies to trade mainly with England and use English ships. The triangular slave trade was an important part of this system, transporting slaves from Africa to the Americas to support plantation economies. Growing discontent in the colonies was driven by desires for greater political and economic freedoms inspired by Enlightenment ideas and changes in rights that occurred in England.