Pre-industrial economies: farms, land and taxes
Before about 1750, around 8 in 10 people worked on the land. Most families grew their own food and sold a little at local markets.
- Land and labour: land belonged to rulers, nobles, temples or village communities. Peasants paid rent or served on the lord's land.
- Taxes: states collected a share of the harvest (often a tenth to a half), labour service (building roads, walls) and tribute goods. Many states kept land surveys and census lists to fix taxes.
- Reforms: when taxes became unfair, governments sometimes replaced many dues with one tax paid in rice or coins, so that peasants paid by the amount of land they held.
- Limits: bad harvests caused famine; population and output rose and fell together, so income per person stayed nearly flat.
Trade, money and the Industrial Revolution
Trade and money
Coins, paper money, bills of exchange and banks made trade over long distances possible. Ports and caravan routes linked Asia, Africa and Europe. Merchants gained wealth and new goods spread.
Industrialisation
From about 1760, first in Britain and then in Europe, North America and Japan, machines and steam power moved production into factories. Railways and steamships cut transport costs. Output per worker rose many times. Problems came too: long working hours, child labour, crowded cities and pollution. Workers formed trade unions; governments slowly passed labour laws.
Innovation
Later waves of innovation — electricity, cars, chemicals, computers and the internet — kept raising productivity. Economists see new ideas and technology as the main long-run driver of growth.
Growth models and economic crises
Three models
- Market (capitalist): private firms and prices decide what to make.
- Planned (command): the state owns industry and sets targets.
- Mixed: markets plus state welfare, rules and public services. Most countries today.
Rebuilding a new state between the wars
After 1918 several newly independent states had to join regions with different currencies, railways and laws into one economy. They faced hyperinflation (prices rising so fast that money lost its value), then currency reform, land reform, new ports and state-led industrial districts — and then the Great Depression.
Major crises
- 1929 Great Depression: a stock-market crash, bank failures and falling trade; unemployment rose to about a quarter of workers in some countries.
- 1997 Asian financial crisis: foreign money left quickly, currencies collapsed and firms went bankrupt. Some countries took emergency loans with strict conditions; many workers lost jobs, and companies and banks were restructured.
- 2008 global financial crisis: risky housing loans in the USA brought down banks and spread worldwide.
Crises bring social change: new laws for banks, welfare and unemployment support, and changes in how people work.
Growth today: fair and sustainable (Try it)
Since 1950, several economies in East Asia and later India and China grew very fast by exporting, investing in education and building industry. Growth cut poverty for hundreds of millions of people.
But growth used fossil fuels, raised carbon emissions and widened gaps between rich and poor. Sustainable development means meeting today's needs without harming future generations: clean energy, recycling (circular economy), fair jobs and good public services.
Try it: ask an elder in your family what things cost and what work they did at your age. Make a mini timeline: farm → trade → factory → service jobs. Then use the slider in the 3D to see how many years the world income took to double.
Key formulas and definitions
- Income per person = total output (GDP) ÷ population
- Growth rate (%) = (new − old) ÷ old × 100
- Inflation rate (%) = (new price − old price) ÷ old price × 100
- Rule of 70: doubling time ≈ 70 ÷ growth rate (%)
- Real growth = nominal growth − inflation (approx.)
Worked examples
1. World income per person rose from about 2100 $ in 1950 to 4100 $ in 1973. Find the percentage increase.
Increase = 4100 − 2100 = 2000. Percentage = 2000 ÷ 2100 × 100 ≈ 95%. It almost doubled in 23 years.
2. An economy grows 7% a year. About how long does it take to double?
Rule of 70: 70 ÷ 7 = 10 years.
3. A loaf costs 2 coins in January and 20 coins in March. What is the inflation over the two months?
(20 − 2) ÷ 2 × 100 = 900%. Prices rising this fast is hyperinflation.
4. A farmer harvests 600 kg of rice and pays one-fifth as tax. How much is left?
Tax = 600 ÷ 5 = 120 kg. Left = 600 − 120 = 480 kg.
Common mistakes
- Thinking growth was always fast. For most of history, income per person barely changed.
- Mixing up nominal and real growth. If prices rise 5% and output value rises 5%, real output did not grow.
- Believing crises have only one cause. Most mix bank risk, debt, falling demand and policy mistakes.
- Thinking a country's model is purely market or purely planned. Most real economies are mixed.