Money, explained · the reference layer

Schools of economic thought

Updated 2026-10-28 · Sources: 9 · 6 schools + 5 currents

Economics is not one body of settled knowledge with a few dissenters. It is a set of rival accounts of what an economy is, several of which are right about different things.

The one thing to remember: Scripture has enormous amounts to say about how you treat a worker, a borrower and a poor neighbour, and nothing at all to say about the optimal interest rate. Anyone who tells you the Bible endorses their macroeconomics is adding to it.

The six schools

Classical: the founding argument

Adam Smith published The Wealth of Nations in 1776 against a world that thought national wealth meant a large pile of gold and a trade surplus. His counter-argument was that wealth is the flow of goods and services a nation actually produces, that specialisation multiplies output, and that a butcher serves you dinner because it serves him, not because he loves you. Ricardo added comparative advantage in 1817: two countries gain from trading even when one is better at making everything, because what matters is what each gives up to produce a thing. That result is counter-intuitive, durable, and still the single most useful idea in trade policy.

Keynesian: the argument from the Depression

Classical economics had no good account of ten years of mass unemployment. Keynes, writing in 1936, proposed one: total spending in an economy can settle at a level too low to employ everyone, and it can stay there, because wages and prices do not fall fast enough and because everyone cutting back at once cuts everyone else's income. His prescription was for governments to spend into the gap. The framework dominated policy for a generation, was badly wounded by the 1970s, and returned in modified form: New Keynesian models with explicit expectations are the workhorse of most central banks today.

Monetarist: the argument from the money supply

Milton Friedman's answer was that Keynesians had lost sight of money. With Anna Schwartz he documented, in a 1963 monetary history, that the Federal Reserve had let the money stock collapse by roughly a third in the early 1930s and thereby turned a recession into the Great Depression. His summary claim (that inflation is always and everywhere a monetary phenomenon) became the most quoted sentence in twentieth-century economics. His prediction that trying to buy lower unemployment with higher inflation would only work until people caught on was vindicated in the 1970s. His policy proposal, a fixed rule for money growth, was not: the relationship between money aggregates and spending broke down in the 1980s and central banks abandoned the target.

Austrian: the argument from knowledge

Hayek's 1945 essay asks a question that sounds simple and is not: how does an economy use knowledge that no single mind possesses? The price of tin rises; thousands of people who have no idea whether a mine flooded or a new use was discovered nonetheless economise on tin. Prices, on this account, are a communication system, and a planner who abolishes them has destroyed the instrument he needs to plan with. The Austrian account of business cycles (that credit expansion pushes interest rates below their natural level and draws capital into projects that cannot be completed) is more contested, and its method, which resists statistical testing on principle, keeps much of the school outside the mainstream conversation.

Behavioural: the argument from the evidence

Kahneman and Tversky's 1979 paper showed experimentally that people evaluate outcomes as gains and losses from a reference point rather than as final states of wealth, and that losses weigh considerably more than equivalent gains. Two decades of work extended the list: we anchor on irrelevant numbers, take the default option, treat identical money differently depending on which mental pocket it is in, and heavily overweight the present. The policy payoff has been real: automatically enrolling employees in retirement plans raises participation dramatically, because the default does the work that exhortation never did. The honest caveat is that this is a catalogue of findings rather than a unified theory, and several famous effects have shrunk under replication. See the psychology of money.

Also on the map

• Marxian

  Marx, Capital (1867). Analyses capitalism through class and the extraction of surplus value; still influential in history and sociology, marginal in mainstream economic modelling.

• Institutional / new institutional

  Veblen; Ronald Coase on the firm and transaction costs (Nobel 1991); Douglass North on institutions (1993); Elinor Ostrom on governing commons without privatising them (2009).

• Public choice

  James Buchanan (Nobel 1986). Applies economic reasoning to politicians and officials, who respond to incentives like everyone else.

• Development economics

  Amartya Sen on capabilities (Nobel 1998); Banerjee, Duflo and Kremer on field experiments in poverty reduction (Nobel 2019).

• Modern Monetary Theory

  A recent heterodox current arguing that a currency-issuing government faces an inflation constraint rather than a financing one. Contested sharply across the profession.

What Scripture actually weighs in on

This is the part of the page most likely to be misused, so it is worth being exact. Scripture speaks, repeatedly and with force, to the following: honest weights and measures; wages paid the day they are earned; impartial courts and no bribes; provision for the poor, the immigrant, the widow and the orphan built into ordinary economic practice; property held as a trust from God rather than owned absolutely; generosity as a duty and not a hobby; diligence in work; the danger of debt; the folly of trusting riches; and the specific, named sin of exploiting someone whose need gives you leverage.

Those are moral commitments, and they constrain economic behaviour hard. What they do not do is select a macroeconomic model.

What it does not settle

There is no biblical marginal tax rate. No chapter tells you whether a central bank should target inflation or nominal income, whether tariffs help or hurt, what a minimum wage should be, whether healthcare should be publicly financed, how large a state should be, or whether markets or plans allocate capital better. Christians who agree entirely about Scripture disagree entirely about these, and that is not a failure of anyone's faith.

Both of the popular shortcuts fail on the text. The reading that makes the Bible a manifesto for unregulated markets has to ignore the gleaning laws, the Jubilee, the prophets' denunciations of land accumulation, and the sheer volume of legislated redistribution in the Torah. The reading that makes it a manifesto for common ownership has to explain Acts 5:4, where Peter tells Ananias that the land was his own and the proceeds were in his own power. The sin was the lie, not the property. The Jerusalem church's sharing was voluntary, local, and driven by love rather than by statute.

The honest posture is this. Take your economics from evidence and argument, hold it with the confidence the evidence actually supports, and take your obligations from Scripture, which are not up for revision by any model. A Keynesian and an Austrian in the same congregation are both required to pay their workers on time.

Go deeper

• Question: Is money the root of all evil?: the verse most often made to carry an economic argument.
• Question: Is it wrong to be rich?: the distribution question at personal scale.
• The psychology of money: the behavioural findings at household scale.
• Inflation and central banks: where the monetarist and Keynesian arguments actually meet policy.
• What is wealth: GDP, its inventor’s warning, and Scripture’s larger definition.
• How we read Scripture on money: the rules that keep a proof text from doing this page’s work.
• Theme: poverty and justice.
• Theme: God’s ownership and stewardship.
• Crash Course on the schools: title checked, linked and not embedded.
• Further reading: the Fed's classroom shelf and the CPI pages.