Example image of eyePlorer eyePlorer map for 'Free trade': Trade Comparative advantage Gains from trade Resource allocation Supply and demand Protectionism Agricultural subsidy Customs union Free trade area Adam Smith Masterpiece The Wealth of Nations David Ricardo Opportunity cost Autarky Business Capital (economics) Factors of production Free trade debate Good (economics) Labour economics Law Monopoly Oligopoly Regulation Subsidy Tariff Tax Trade barrier Mercantilism Communism Isolationism Opium Wars Peloponnesian War Portuguese Colonial War Developed country Infant industry argument Ha-Joon Chang Export-oriented industrialization Four Asian Tigers Import substitution industrialization World Bank British America Navigation Acts American Revolution American Revolutionary War Parliament of Great Britain Prohibitory Act Second Continental Congress Henry Clay