Origins and early development of economics

The term "economy" comes from the Greek word "oikonomia", which combines "oikos" meaning household and "nemein" meaning management or dispensation. Economics emerged as an independent field of study in the late 17th and early 18th centuries.

Key economic ideas in the 18th century

During the 18th century, economic thought began to emphasise individual behaviour and the role of markets. This period laid the groundwork for understanding how self-interest drives economic activity and how markets can organise society.

Adam Smith (1723-1790)

Adam Smith is often seen as a foundational figure in economics. In his 1776 book "The Wealth of Nations", he described individual economic behaviour as motivated by self-interest and the pursuit of personal gain.

Key contributions:

• Invisible hand - Smith introduced the idea of the "invisible hand", where individual decisions in a market lead to organised and beneficial outcomes for society as a whole, without central planning.
• Laissez-faire approach - He argued that markets should function with minimal interference, allowing free operation to achieve the best results.
• Role of government - While supporting free markets, Smith recognised that governments must provide essential conditions, such as legal frameworks and infrastructure, for markets to work effectively.

Major developments and thinkers in the 19th century

The 19th century was dominated by classical economists who explored production, consumption, and the dynamics between different economic factors. The focus shifted from early emphasis on supply and wages to include consumer behaviour and utility.

Key classical economists and their ideas

• Alfred Marshall (1842-1924) - Developed the demand and supply framework, using diagrams to show how prices and quantities reach equilibrium in markets, often compared to a pair of scissors where both blades are essential.
• William Stanley Jevons (1835-1882) - Advanced the "marginal revolution" by distinguishing total utility (overall satisfaction from a good) from marginal utility (the additional satisfaction from one more unit of a good).
• Jean-Baptiste Say (1767-1832) - Formulated Say's Law, which states that supply creates its own demand; production generates the income needed to buy goods, so wealth comes from producing rather than just consuming.
• Karl Marx (1818-1883) - Highlighted conflicts between labour and capital in his 1867 work "Das Kapital". He predicted that these tensions would lead to the collapse of capitalist systems and inspired movements for radical economic and political change.

Shifts in focus during the century

Early in the 19th century, economists concentrated on production processes, supply-side factors, and the links between wages and profits. By the later part, attention turned more to consumption, with the introduction of utility as a way to measure value based on satisfaction.

Economic theories in the 20th century

The 20th century saw major shifts in economic thinking, influenced by global events like depressions and crises. Ideas moved between government intervention and free-market approaches, with key debates on how economies achieve stability.

John Maynard Keynes (1883-1946)

John Maynard Keynes published "The General Theory" in 1936, challenging classical views by arguing that effective demand (total spending in the economy) determines output levels.

Key contributions:

• Keynesian framework - He believed market economies do not automatically return to full employment and require government action, such as fiscal policy (adjusting taxes and spending), to stimulate demand.
• Influence and revival - Keynesian ideas were prominent until the mid-1970s but regained attention during the 2008-09 financial crisis and the 2020 Covid-19 pandemic.

Milton Friedman and monetarism (1912-2006)

Milton Friedman led the monetarist response, promoting free markets, deregulation, and restricted government roles.

Key contributions:

• Monetarist principles - Emphasised controlling the money supply to manage inflation and economic stability, influencing policies in the 1980s.
• Compromise perspective - A balanced view emerged, suggesting Keynesian methods work in the short term for quick adjustments, while monetarist ideas apply in the long term for sustained growth.

Modern approaches in the 21st century

Economic thought in the 21st century has expanded to include human behaviour and environmental concerns, moving beyond traditional models to address real-world complexities and sustainability.

Behavioural economics

This approach examines how psychological, cognitive, emotional, cultural, and social factors affect economic decisions. It builds on standard economics by incorporating elements like happiness, satisfaction, and cooperative behaviours for a more realistic view of how people make choices.

Sustainability and the circular economy

Sustainability highlights the connections between the economy, society, and the environment, promoting practices that support long-term viability.

Circular economy principles:

• This model designs products for reuse in biological (natural decomposition) or technical (recycling) cycles, with goods made for easy disassembly.
• Aim to eliminate waste, minimise purchases of new raw materials, and rely on renewable energy for production and transport.