Definition
Political economy was the name used from roughly 1700 to the late 19th century for what is now called economics. The phrase signals an important intellectual commitment: it treats the production, distribution, and exchange of goods as inseparable from the political institutions — property law, taxation, monetary regulation, trade policy, labour law — that shape them.
Adam Smith's Wealth of Nations (1776) is the founding text of classical political economy. David Ricardo, Thomas Malthus, John Stuart Mill, and Karl Marx all worked within the same broad tradition. The term began to give way to "economics" in the 1870s, when the marginalist revolution (Jevons, Marshall, Walras) pushed the field toward more abstract, mathematical, and politically-neutral analysis. The older name survives today in heterodox economics, in the field called "international political economy," and in much historical and comparative work.
Why it matters
What political economy includes
The 18th- and 19th-century political economists treated as a single subject what modern academic economics has often separated:
- Production — how goods come into being; the technology, organisation, and labour processes by which value is created.
- Distribution — how the value produced is divided among labour, capital, and land (Smith's trinity).
- Exchange — how money, prices, and markets coordinate the movement of goods.
- Consumption — what people buy, what they value, what shapes demand.
- Public finance — taxation, government spending, public debt.
- Trade policy — tariffs, subsidies, the balance of payments.
- Property law — who owns what, with what rights, under what conditions.
- Money and banking — the institutions of credit and currency.
- Labour law — the rules governing the labour market, including combinations, settlement, apprenticeship.
- Colonies and empire — the economic logic of imperial systems (heavily analysed in Smith's Book IV).
Modern academic economics has separated most of these into specialised subfields. The integrated view that political economy maintained — looking at the whole simultaneously — has substantial costs but also genuine analytical advantages.
Smith as political economist
The Wealth of Nations exemplifies the political-economy approach. It is not a technical economics text in the modern sense; it is a sustained argument about how the production and distribution of wealth depend on (and shape) political institutions:
- Book I analyses production, prices, wages, profit, and rent — but constantly interrupts the analysis to discuss apprenticeship laws, settlement laws, and guild restrictions.
- Book II analyses capital, banking, and credit — but cannot do so without discussing sovereign abuse of the monetary system.
- Book III is explicitly historical-institutional: feudal property law and chartered urban freedoms drove European economic development.
- Books IV-V (not in this synthesis) turn entirely to policy: the mercantile system, colonies, public finance, taxation, defence, education.
Throughout, Smith treats economic phenomena as the joint product of human nature, market forces, and political institutions. Removing any of the three would make the analysis incoherent. This is what "political economy" means.
The narrowing into "economics"
The shift from political economy to economics in the late 19th century brought enormous benefits — mathematical precision, theoretical rigour, cross-country comparability — but also costs:
- Institutions became background rather than analytical foreground. Many models assume away property rights, legal frameworks, and political variation.
- Politics became external. The political economy of who-wins-who-loses-from-this-reform receded from mainstream analysis.
- Distribution became secondary. The trinity framework (wages, profit, rent) is replaced in much modern theory by aggregate variables that hide the distributional structure.
These narrowings have been pushed back against repeatedly — by Marx in the late 19th century, by institutionalists in the early 20th, by Polanyi and the welfare-state theorists at mid-century, and by modern political economists like Acemoglu and Robinson today.