The mercantile theory dictated both the visible and invisible trades throughout the colonies. Mercantilists believed that national wealth and power were best served by increasing exports and collection precious metals in return. Many positive economic effects came from the first signs of mercantilism: the Trade and Navigation Acts. In England, mercantilist policies were effective in creating a skilled industrial population and a large shipping industry, and it was reflected in the colonies. Foreign competition was cut down because any foreign ship had to have a license in order to enter a colonial port. Laws that restricted British ships, captains, and crews helped New England shipyards and gave many New Englanders jobs as sailors. Tobacco laws ensured a colonial monopoly seeing that America was the only provider of the "light tobacco" rather than the harsher tobacco produced in the West Indies. These laws were worked into colonial trade quite easily; hardly any of them were strictly enforced. This was known as "salutary neglect". Smuggling was usually ignored, and "friendly customs officers" gladly accepted bribes in colonial ports; Britain knew of these happenings, yet did not mind because they knew a war with France was highly possible, and did not want hostile feelings towards them coming from their colonies.
Although mercantilism was profitable for England, it