Classical economics

Also called: Classical school, Classical tradition · Topic: Schools of Economic Thought and Economic Laws · NCERT: Class 12, Ch 1 "Introduction (Macroeconomics)"

Meaning

Classical economics was the first modern school of economics. It was mostly British and ran from Adam Smith's Wealth of Nations (1776) to the mid-19th century. Its core belief was that a free market settles by itself at full employment: "all the labourers who are ready to work will find employment and all the factories will be working at their full capacity" (NCERT, Class 12). So the state only needs to play a small role.

It matters because it built the case for free markets, free trade and a limited state. Keynes (1936) later attacked exactly this belief after the Great Depression. Its central idea is Say's law: supply creates its own demand.

Explanation

Core beliefs: why the market clears by itself

• Full employment is the normal state. There is no lasting unemployment, so the state does not need to step in.
• Say's law (J.B. Say, Treatise on Political Economy, 1803). "Supply creates its own demand."
• Producing goods worth ₹100 creates incomes of ₹100 (wages, rent, interest, profit).
• People spend these incomes on other goods.

• So all output finds buyers, and there is no general glut (no overproduction across the whole economy). A few goods may pile up for a while, but not all goods at once.

• Invisible hand (Smith). Prices adjust by themselves until the market clears.

• Excess demand (buyers want more than sellers offer) → price rises
• Excess supply (sellers offer more than buyers want) → price falls
• This goes on until demand = supply (market equilibrium)

• Smith uses the phrase only once in Wealth of Nations.

• Self-interest serves society. "It is not from the benevolence of the butcher, the brewer, or the baker, that we expect our dinner, but from their regard to their own interest." In his Theory of Moral Sentiments (1759), Smith also assumed that people feel sympathy and follow moral rules. So he did not praise greed.

• Laissez-faire (the state interferes in the economy as little as possible). Smith gave the state only three duties: 1. Defence, against foreign attack 2. Justice, to protect people from injustice by others 3. Public works and institutions that no private person would find profitable to run (roads, bridges, basic education)
• Critics mocked this as the night-watchman state (a state limited to police, courts and defence). The phrase is linked to Ferdinand Lassalle.

Key thinkers and their ideas

• Adam Smith (1723–1790), Wealth of Nations (1776). NCERT calls him the "founding father of modern economics". At that time the subject was called "political economy".
• Division of labour (splitting production into small, specialised tasks) was, for him, the main source of higher productivity.
• It is "limited by the extent of the market". A small village cannot support a specialist pin-maker.

• His trade idea was absolute advantage.

• Labour theory of value (Smith, Ricardo). A good's value depends on the labour time needed to make it. If a chair takes 4 hours and a stool takes 2 hours, then 1 chair = 2 stools.

• David Ricardo (1772–1823), Principles of Political Economy and Taxation (1817).
• He studied how output is divided among landlords (rent), workers (wages) and capitalists (profit) [3].
• He argued that growth must sooner or later stop, because growing food on a limited area of land keeps getting costlier [3].
• Comparative advantage: a country should export what it makes at a lower opportunity cost (what it gives up of other goods to make it). This holds even if it is worse at making everything.

• Differential rent: rent comes from differences in how fertile the land is. He used this to attack the Corn Laws (British import duties on grain, repealed in 1846).

• Thomas Malthus (1766–1834), Essay on the Principle of Population (1798).

• Population grows geometrically (1, 2, 4, 8…) but food grows only arithmetically (1, 2, 3, 4…). So population tends to outrun the food supply [2].
• Positive checks (famine, disease, war) raise the death rate. Preventive checks (late marriage, moral restraint) lower the birth rate.

• Malthus met Ricardo in 1811, and they became close friends [2].

• Iron law of wages (Ricardo; named by Lassalle). In the long run, population pressure pushes real wages (wages measured by what they can actually buy) down to subsistence (the bare minimum needed to stay alive).

• Wages above subsistence → families grow → more workers → wages fall back

• This fits Malthus's view that population adjusts to the means of supporting it [4].

• J.S. Mill, Principles of Political Economy (1848), was the last great classical economist.

• He separated the laws of production (fixed by nature) from the laws of distribution (which society can change, for example through taxes).

• This opened the door to reform and a bigger role for the state.

• Utilitarianism (Bentham, Mill). The right action gives "the greatest happiness to the greatest number". It underpins early welfare economics (the study of how policy changes total well-being).

Worked examples

• Pin factory (Smith):
• 10 workers, each doing one step, made about 48,000 pins a day.
• 48,000 ÷ 10 = 4,800 pins per worker per day.

• One untrained worker doing every step alone could make hardly 20 pins a day. So specialisation raised output by more than 200 times.

• Comparative advantage (Ricardo), in labour-years needed to make one unit:

	Wine	Cloth
Portugal	80	90
England	120	100

• Portugal is better at both goods, so it has an absolute advantage in both.
• Cost of 1 wine: in Portugal 80/90 = 0.89 cloth; in England 120/100 = 1.2 cloth.

• So Portugal should make wine and England should make cloth. If each specialises and they trade, both gain.

• Differential rent (Ricardo): three plots, each with a cost of 60 quintals of grain.

Land	Output	Rent (Output − 60)
A (most fertile)	100	40
B	80	20
C (marginal, i.e. the worst land in use)	60	0

• As population grows, poorer land comes into use. Rent on better land then rises, even though the landlord does nothing.

How the classical view was challenged

• Keynes (1936) reversed Say's law: demand creates supply.
• People hoard their savings → spending falls short → firms cut output → workers lose jobs.

• So unemployment can last, and the state must step in.

• The marginal revolution (1870s) replaced the labour theory of value with value based on utility (the satisfaction a buyer gets from a good).

• Karl Marx built his theory of exploitation on the classical labour theory of value.
• The Industrial Revolution and the demographic transition (first death rates fall, then birth rates fall) helped the world escape the Malthusian trap.

In India

Classical economics is a theory, so no institution measures it. But its ideas run through Indian policy debates:

• 1991 reforms. India moved away from the Mahalanobis model and import substitution (1950–90), which protected home industry. It moved closer to Smith's laissez-faire.
• Smith's three duties plus more. The Indian state still carries out defence, justice and public works. It has also added a large welfare role, which comes from utilitarian welfare economics (Bentham, Mill).
• Ricardo in trade policy. India's place in the WTO system rests on Ricardo's comparative advantage, which treats trade as positive-sum (both sides gain).
• Malthus and Indian demography. The Green Revolution and falling fertility show that technology and the demographic transition broke the Malthusian trap in India.
• Ricardo's "limited land". His point that farming on limited land gets costlier comes back in Indian debates on farm productivity and land fragmentation (farms split into ever-smaller plots).

Don't confuse with

• Mercantilism (16th–18th century): it held that wealth is the stock of gold and silver and that trade is zero-sum (one nation gains only if another loses), with the state in the lead. The classical school saw trade as positive-sum and let the market lead.
• Physiocracy (France, 1750s–70s): it held that only agriculture yields a net surplus (produit net) and that manufacturing is "sterile". Smith took the physiocrats' free-trade idea but rejected the "sterile industry" claim. The slogan "laissez faire, laissez passer" is physiocratic, not Smith's.
• Keynesian economics (1936): it says demand creates supply, so unemployment can last and the state must step in. The classical school said supply creates demand and full employment is automatic.
• Absolute vs comparative advantage: absolute advantage (Smith) means making a good with less labour. Comparative advantage (Ricardo) means making it at a lower opportunity cost.

Prelims Hooks

• NCERT's classical belief (Class 12, Introduction): all workers ready to work find jobs and all factories run at full capacity. Keynes (1936) challenged this.
• Say's law (J.B. Say, 1803): "supply creates its own demand", so there is no general glut. Keynes rejected it.
• Books and years: Theory of Moral Sentiments, Smith (1759); Wealth of Nations, Smith (1776); Essay on Population, Malthus (1798); Principles of Political Economy and Taxation, Ricardo (1817); Principles of Political Economy, J.S. Mill (1848).
• Trap: differential rent and comparative advantage come from Ricardo, not Smith. Smith's trade idea was absolute advantage.
• Trap: late marriage is a preventive check (it lowers the birth rate), not a positive check. Positive checks (famine, disease, war) raise the death rate.
• Invisible hand: appears only once in Wealth of Nations. Division of labour is limited by the extent of the market. Pin factory: 10 workers made about 48,000 pins a day.

Mains Points

• State vs market in Indian policy (GS-III):
• Import substitution (1950–90) protected infant industries and leaned away from classical free trade.
• The 1991 reforms moved India towards Smith's laissez-faire.

• India still pairs market freedom with a strong welfare state, drawing on Mill's point that distribution can be changed by society.

• Free trade vs neo-mercantilism (GS-III):

• Today's tariff wars and export-led surplus strategies bring back zero-sum thinking.

• Ricardo's comparative advantage, which underpins the WTO system, gives the positive-sum answer. Use it to judge protectionist moves.

• Limits of self-correcting markets (GS-III):

• Keynes (1936) showed that Say's law fails when people hoard savings, which justifies government spending in a slump.
• Malthus and Ricardo's worries about limited land still matter for India's farm productivity, land fragmentation, and water and climate stress. The Club of Rome's Limits to Growth (1972) revived these fears in neo-Malthusian form.

Related concepts

• Mercantilism
• Bullionism
• Physiocracy
• Laissez-faire
• Night-watchman state
• Division of labour
• Labour theory of value
• Say's law
• Malthusian theory of population
• Malthusian trap

Read more

• Mercantilism, physiocracy and classical political economy