The Postwar Golden Age

Building on the Ruins

The postwar golden age began in rubble. Europe’s cities lay flattened. Japan’s industrial base was destroyed. Tens of millions were dead, displaced, or dispossessed. And yet the quarter-century that followed — roughly 1945 to 1971 — produced the most sustained and broadly shared economic expansion in human history. Growth rates that would be considered miraculous today were routine. Unemployment in the industrial democracies fell to levels not seen before or since. Real wages rose year after year. The middle class, in the sense that politicians and advertisers would come to use the term, was essentially invented during this period. Understanding how it happened, and why it ended, remains one of the central puzzles of economic history.

The Architecture of Bretton Woods

The foundations were laid before the war even ended. In July 1944, delegates from forty-four nations gathered at the Mount Washington Hotel in Bretton Woods, New Hampshire, to design a new international monetary order. The conference was dominated by two figures: John Maynard Keynes, representing Britain, and Harry Dexter White, representing the United States. They disagreed on nearly every detail but shared a conviction that the interwar catastrophe — competitive devaluations, capital flight, the collapse of trade — must be made structurally impossible.

The system they created was a managed compromise between fixed and floating exchange rates. Currencies were pegged to the U.S. dollar, which was itself convertible to gold at thirty-five dollars per ounce. Countries could adjust their pegs in cases of “fundamental disequilibrium,” but day-to-day fluctuations were tightly constrained. The International Monetary Fund was established to provide short-term financing to countries with balance-of-payments difficulties. The World Bank was created to fund reconstruction and development. Capital controls were not merely permitted but expected — the free movement of speculative money was seen as destabilizing, a lesson learned at terrible cost in the 1930s.

Bretton Woods gave the postwar world something it had lacked since 1914: a stable monetary framework within which trade could expand and investment could flow. It was not perfect — the system depended on American willingness to run deficits and maintain gold convertibility, a tension that would eventually prove fatal — but for a generation, it worked.

Reconstruction and the Marshall Plan

Stability alone was not enough. Europe needed capital, and in 1947 the United States provided it through the Marshall Plan — the most ambitious program of international economic assistance ever undertaken. Over four years, roughly thirteen billion dollars (equivalent to well over a hundred billion in today’s money) flowed to sixteen European countries. The aid was conditional: recipients had to cooperate with one another, liberalize trade barriers, and submit to American oversight of how the funds were used.

The Marshall Plan’s economic impact is debated — some historians argue that European recovery was already underway before the money arrived — but its political and psychological effects were immense. It demonstrated that the United States would not retreat into isolationism as it had after the First World War. It bound Western Europe together in a web of economic cooperation that would eventually evolve into the European Union. And it established the principle, radical at the time, that wealthy nations had an interest in the economic health of their trading partners.

Keynesian Demand Management in Practice

The golden age was also the high point of Keynesian demand management. Governments across the industrial world committed themselves, explicitly or implicitly, to maintaining full employment. When private demand flagged, fiscal policy would compensate — through public spending, tax cuts, or transfer payments. When the economy overheated, policy would tighten. The business cycle would not be eliminated, but its worst extremes would be smoothed away.

In practice, this worked better than anyone had a right to expect. The violent booms and busts that had characterized prewar capitalism gave way to mild recessions and steady growth. Unemployment in the United States averaged about 4.5 percent during the 1950s and 1960s. In Western Europe, it was often below 2 percent. Governments built highways, funded universities, expanded social insurance, and invested in public health — all while running budgets that, by later standards, looked remarkably responsible. The welfare state, in its various national forms, was constructed during this period: Britain’s National Health Service, France’s securite sociale, Germany’s social market economy, Scandinavia’s comprehensive welfare systems.

The Neoclassical Synthesis

Academic economics adapted to match. Paul Samuelson’s 1948 textbook, Economics, translated Keynes’s ideas into the language of neoclassical microeconomics, creating what became known as the “neoclassical synthesis.” The idea was that Keynesian macroeconomics — the management of aggregate demand — was compatible with, and indeed complementary to, the marginalist microeconomics of supply and demand. In the short run, Keynes was right: demand mattered, unemployment was possible, and government intervention was sometimes necessary. In the long run, the classical economists were right: prices adjusted, markets cleared, and the economy gravitated toward its natural potential.

Robert Solow’s 1956 growth model gave this synthesis a dynamic dimension. Solow showed that long-run economic growth depends not on capital accumulation alone but on technological progress — a residual factor that his model could measure but not explain. The Solow residual, as it came to be called, accounted for the lion’s share of observed growth, a finding that was both illuminating and frustrating. Growth theory could describe the pattern but not its ultimate source.

The Phillips Curve and Its Promise

In 1958, A.W. Phillips, a New Zealand-born economist working at the London School of Economics, published an empirical study of the relationship between unemployment and wage inflation in Britain over nearly a century. The data revealed a stable, inverse relationship: when unemployment was low, wages rose rapidly; when unemployment was high, wages stagnated. The Phillips Curve, as it was quickly named, seemed to offer policymakers a menu of choices — a trade-off between inflation and unemployment that could be exploited. Want lower unemployment? Accept a bit more inflation. Worried about prices? Tolerate a bit more joblessness.

The Phillips Curve became the operating manual for Keynesian demand management. It suggested that fine-tuning was possible — that skilled policymakers could choose their preferred point on the curve and steer the economy toward it. For about a decade, the data seemed to cooperate. Then it didn’t.

Development Economics and the Third World

The golden age was also the era in which development economics emerged as a distinct field. Decolonization created dozens of new nations across Asia, Africa, and the Caribbean, all seeking paths to industrialization and prosperity. Economists like W. Arthur Lewis, Gunnar Myrdal, Albert Hirschman, and Raul Prebisch wrestled with questions the neoclassical synthesis could not easily answer. Why were some countries rich and others poor? Was the gap closing or widening? Could the development path followed by Europe and North America be replicated, or did the structure of the global economy systematically disadvantage latecomers?

Nicholas Kaldor’s 1961 catalog of “stylized facts” about economic growth — that output per worker grows steadily, that capital-output ratios are roughly constant, that the shares of income going to labor and capital are stable — provided empirical benchmarks that growth theorists would spend decades trying to explain. The answers, when they came, would challenge comfortable assumptions about convergence and catch-up.

Why the Golden Age Ended

The system’s fatal flaw had a name: the Triffin dilemma. Robert Triffin pointed out in 1960 that the Bretton Woods system required the United States to run persistent balance-of-payments deficits in order to supply the world with dollars. But those deficits gradually undermined confidence in the dollar’s convertibility to gold. The more dollars circulated abroad, the less plausible it became that the United States could actually redeem them all at thirty-five dollars per ounce. The system was inherently unstable — it depended on a promise that growing American deficits made increasingly incredible.

By the late 1960s, the strains were acute. The Vietnam War and Great Society spending were generating inflation. Foreign central banks, led by France, began demanding gold for their dollars. The Phillips Curve trade-off was getting worse — more inflation was buying less employment. On August 15, 1971, Richard Nixon closed the gold window, ending dollar convertibility and effectively killing Bretton Woods. The golden age was over. The problems that followed — stagflation, oil shocks, the collapse of the postwar consensus — would require entirely new thinking, or at least a painful rediscovery of old arguments the golden age had seemed to render obsolete.