What is Keynesianism?
Keynesianism starts from a worry about unemployment. John Maynard Keynes saw that a market economy can get stuck. If families and firms all save and spend less at once, sales fall, firms cut staff, and incomes fall further. Left alone, the slump may last for years. His answer was for the government to act as a counterweight: borrow and spend, or cut taxes, when private demand is weak, and rein things in when the economy runs hot. Keynesians keep private firms and markets, but they expect the state to steady them. For this reason the view sits between pure free-market thinking and socialism.
Core beliefs
- Spending by households, firms and government decides output and jobs in the short run.
- Markets can stay stuck in a slump for long periods.
- Deficits are fine in a downturn, provided they are paid down in good times.
- High employment is a proper goal for public policy.
- When interest rates are near zero, cutting them further may do little, so fiscal action matters.
- Countries do better when they cooperate on money and finance.
History
The Great Depression of the 1930s broke the belief that markets heal themselves quickly. Keynes set out a new theory in The General Theory of Employment, Interest and Money, in 1936. Economists such as Alvin Hansen spread it in America. Keynes was also a leading figure at the Bretton Woods conference in 1944, where the IMF and the World Bank were planned. For about 30 years after the war, Western governments used demand management and built welfare states. The 1970s brought both high inflation and high unemployment, which the old models handled badly, and monetarism took over in many places. After the 2008 crash, stimulus spending made Keynes popular again.
Variants
The neoclassical synthesis, taught by Paul Samuelson, blended Keynes with older theory and dominated mid-century textbooks. New Keynesians, from the 1980s, explain why wages and prices adjust slowly, and their models guide most central banks today. Post-Keynesians, following Joan Robinson and Hyman Minsky, stress deep uncertainty, inequality and the risk of financial crises, and want a bigger role for the state. In politics, Keynesian methods have been used by social democrats, liberals and even some conservatives.
Criticisms
Monetarists such as Milton Friedman held that fiscal policy acts too slowly and risks inflation, and that steady growth of the money supply matters most. Other economists argued that people see policy coming and adjust, which blunts its effect. Fiscal conservatives say Keynesianism gives politicians an excuse for permanent deficits, because spending in bad times is popular and cutting in good times is not. Some on the left argue that it only props up capitalism and leaves ownership and power untouched.
In practice
Postwar policy in Britain, the United States and western Europe was shaped by Keynes. Examples are Britain's 1944 white paper on employment and America's Employment Act of 1946. Automatic stabilizers, like jobless benefits that grow in recessions, work on Keynesian logic. After 2008, and again during the COVID-19 pandemic, many governments spent heavily to prop up demand. On the 12 axes it scores near the middle on Ownership and Markets, toward Shared on Welfare, and toward Cooperation on Foreign policy.