Q.Explain the main features of classical economic thought with reference to Adam Smith, Ricardo and Malthus.

Classical economics rests on three thinkers who each contributed a different piece of the framework.

Classical economics, the dominant school of thought from the late 18th to the mid-19th century, was built primarily on the contributions of three British economists: Adam Smith, David Ricardo and Thomas Malthus. Although each focused on different questions, together their work established a shared set of features that define classical economics as a whole.

Adam Smith (1723–1790), in The Wealth of Nations (1776), argued that a nation's wealth grows chiefly through the division of labour — splitting production into simple, repeated tasks that raise output dramatically, as his pin-factory example illustrated. Smith's most influential idea was the 'invisible hand': individuals pursuing their own self-interest within a competitive market are led, without intending it, to also serve the interests of society as a whole. This underpinned the classical policy conclusion of laissez-faire — that government should interfere with economic activity as little as possible — and classical economists generally accepted Say's Law, the view that supply creates its own demand, so a persistent economy-wide glut of unsold goods and unemployed workers should not occur.

David Ricardo (1772–1823), in Principles of Political Economy and Taxation (1817), extended Smith's framework in two important ways. His theory of comparative advantage showed that two countries both gain from trading with each other by specialising according to their relative (not absolute) efficiency — providing the classical case for free international trade. His theory of rent explained rent as arising from differences in land fertility: as population growth forces less fertile land into cultivation, the cost of farming that marginal land sets the price of food, and owners of more fertile land earn rent as a pure surplus.

Thomas Malthus (1766–1834), in An Essay on the Principle of Population (1798), warned that population tends to grow geometrically while food supply grows only arithmetically, so that population is eventually restrained either by positive checks (famine, disease, war) or preventive checks (late marriage, moral restraint) — a pessimistic conclusion that shaped classical economics' cautious view of unchecked population growth.

Taken together, the common features of classical economic thought were: belief in a largely self-regulating, competitive market economy; support for laissez-faire and minimal government interference; acceptance of Say's Law and the resulting belief that involuntary, economy-wide unemployment could not persist; a labour-based theory of value; and a generally optimistic view of free trade (Ricardo) alongside a more pessimistic view of population and resource limits (Malthus). It was precisely this belief in a self-correcting economy that the Great Depression of the 1930s would call into question, opening the way for the Keynesian revolution discussed later in this chapter.