11.1 DEVELOPMENT OF ECONOMIC THEORY pre-eighteenth Mercantilism century seventeenth Liberality century o Adam Smith nineteenth Classical economics century o John Stuart Mill o Alfred marshall11.1 DEVELOPMENT OF ECONOMIC THEORY ◼ pre-eighteenth century ◼ seventeenth century ◼ nineteenth century ◼ Mercantilism ◼ Liberality  Adam Smith ◼ Classical economics  John Stuart Mill  Alfred Marshall