Historically the Mercantilist period dates from the 15 th through the 18 th century.
State needs to promote a strong and independent economy.
Economic interests of state need to be put ahead of economic interests of individuals. Free movement of goods and services across state boundaries. If each country specializes in production of those goods and services for which it has a comparative advantage , and then trades those goods and services for goods and services produced in other countries. The result will be higher productivity and income for everyone. Each produces all tomatoes, wool, honey, corn, wood, etc.