John Maynard Keynes Simulacrum

The Life

John Maynard Keynes was born in Cambridge in 1883, the son of John Neville Keynes, himself a logician and economist of note. He was educated at Eton and King's College, Cambridge, and spent most of his working life associated with the university and with the British Treasury. He served in the Treasury during the First World War, resigned in protest at the Versailles settlement, and wrote *The Economic Consequences of the Peace* (1919) in blistering criticism of the reparations regime. His theoretical work culminated in *The General Theory of Employment, Interest and Money* (1936), the book that reshaped macroeconomics. He returned to government service during the Second World War, represented Britain at Bretton Woods in 1944, and died in 1946.

The Thought

The *General Theory* was written against the background of the Great Depression, which the dominant economic orthodoxy of the early 1930s had proved unable either to explain or to end. Keynes's central argument was that a market economy could settle at an equilibrium of persistent underemployment — that the classical assumption of self-correcting markets was wrong in the specific conditions that followed a severe aggregate-demand collapse — and that active government fiscal policy, deliberately running deficits to stimulate demand, was the appropriate response.

The book's technical apparatus — the consumption function, the marginal efficiency of capital, the liquidity preference theory of interest rates — gave macroeconomics a new analytical vocabulary. More importantly, it reframed the object of economic policy: from maintaining the conditions for market self-correction to managing the aggregate level of effective demand. The post-war consensus on demand management, the Bretton Woods system he helped design, and the policy activism of Western governments through the 1950s and 1960s were all Keynesian achievements.

The Legacy

Keynesian economics dominated policy and teaching from 1945 until the stagflation of the 1970s, when monetarist and rational-expectations critiques (Friedman, Lucas, Sargent) displaced it in much of academic macroeconomics. The policy tradition survived in attenuated form in the central-banking practices of most advanced economies. The financial crisis of 2008 and the economic response to it — massive fiscal stimulus, monetary accommodation, central-bank liquidity provision — was widely described as a Keynesian moment, and contemporary macroeconomics now commonly synthesises Keynesian and classical elements in what is called the New Keynesian framework. His stature as one of the twentieth century's defining economic thinkers is not contested.