John Maynard Keynes

By Lin Yue

John Maynard Keynes was born in Cambridge in 1883, the son of an economist and a pioneering suffragist, and grew up at the very center of England's intellectual establishment — Eton, King's College Cambridge, the secret society of the Apostles, the Bloomsbury set. Few lives better illustrate how an idea, once loosed, outruns its author. Keynes began as the cleverest of civil servants: a Treasury official during the First World War who watched the machinery of state finance from the inside and concluded that the men operating it understood almost nothing about what they were doing.

In 1919 he walked out of the Paris Peace Conference in protest at the reparations imposed on Germany, and his furious polemic, The Economic Consequences of the Peace, became an international sensation. A twenty-six-year-old Treasury man was telling the victors they were planting the seeds of the next catastrophe — and he was right. Through the 1920s he fired off tracts and pamphlets with the confidence of a man who had never once been out-argued, attacking the gold standard, the Treasury's orthodoxy, and the complacent doctrine that unemployment was the workers' own fault for pricing themselves out of jobs.

Then came the crash of 1929 and the grinding Depression, and Keynes produced the book that made him immortal. The General Theory of Employment, Interest and Money (1936) demolished the classical faith that markets self-correct toward full employment. Demand, not supply, drives the economy: when fear seizes households and firms, spending collapses, and the collapse feeds on itself — the paradox of thrift, in which everyone's prudence makes everyone poorer. Interest rates cannot always be cut low enough to restart the machine, because money can simply be hoarded; investment is hostage to what he called "animal spirits," the waves of optimism and panic no equation can tame. And the multiplier means that one pound of government spending, circulating through wages and shops, can generate several pounds of national income.

The prescription was heresy: in a slump, the state must spend — deliberately run deficits — to replace the demand the private sector will not provide. Markets were brilliant servants and terrible masters; capitalism could be saved from itself, but only if it was steered.

Keynes died in 1946, exhausted, weeks after helping design the Bretton Woods system at the 1944 conference — the IMF and the World Bank, the fixed-exchange architecture meant to prevent the monetary chaos that had poisoned the 1930s. His proposed world currency, the bancor, was rejected by the Americans, but the order he midwifed governed global finance for a generation.

He was also, improbably, a patron of the arts — founding the Arts Theatre in Cambridge, rescuing Covent Garden's finances, marrying the Russian ballerina Lydia Lopokova. Economics, for Keynes, was never a dismal science but one instrument among many for making civilization worth living in.

Impact on civilization

For three decades after 1945, Keynes's ideas were the operating system of the Western world. Governments promised full employment and used fiscal policy to chase it; the golden age of postwar growth — rising wages, mass consumption, the welfare state — was built on his logic. When stagflation struck in the 1970s, the monetarists pushed him aside; when the 2008 financial crisis struck, governments reached for the stimulus playbook again, vindicating the General Theory's verdict: in a collapse, demand is the only thing that matters. Automatic stabilizers, countercyclical budgets, central banks acting as lenders of last resort, and the very idea that mass unemployment is a policy failure rather than a law of nature — all of it is Keynes. He did not merely explain the economy; he gave the modern state its job description.

The welfare states of Europe, Japan's high-growth decades, and the development economics that industrialized the poor world all ran on Keynesian fuel. Even his enemies govern in his shadow: every central bank that cuts rates in a downturn, every treasury that borrows to fight a recession, is conceding his central point — that waiting for markets to heal themselves is not policy but abdication.