ECONOMIC and political cycles have a habit of being out of sync. Just ask George Bush senior, who lost the presidential election in 1992 because voters blamed him for the recent recession. Or Chancellor Gerhard Schröder, booted out by German voters in 2005 after imposing painful reforms, only to see Angela Merkel reap the rewards.

Today, almost ten years after the most severe financial crisis since the Depression, a broad-based economic upswing is at last under way (see article). In America, Europe, Asia and the emerging markets, for the first time since a brief rebound in 2010, all the burners are firing at once.

But the political mood is sour. A populist rebellion, nurtured by years of sluggish growth, is still spreading. Globalisation is out of favour. An economic nationalist sits in the White House. This week all eyes were on Dutch elections featuring Geert Wilders, a Dutch Islamophobic ideologue (see article), just one of many European malcontents.

This dissonance is dangerous. If populist politicians win credit for a more buoyant economy, their policies will gain credence, with potentially devastating effects. As a long-awaited upswing lifts spirits and spreads confidence, the big question is: what lies behind it?

All together now

The past decade has been marked by false dawns, in which optimism at the start of a year has been undone—whether by the euro crisis, wobbles in emerging markets, the collapse of the oil price or fears of a meltdown in China. America’s economy has kept growing, but always into a headwind (see article). A year ago, the Federal Reserve had expected to raise interest rates four times in 2016. Global frailties put paid to that.

Now things are different. This week the Fed raised rates for the second time in three months—thanks partly to the vigour of the American economy, but also because of growth everywhere else. Fears about Chinese overcapacity, and of a yuan devaluation, have receded. In February factory-gate inflation was close to a nine-year high. In Japan in the fourth quarter capital expenditure grew at its fastest rate in three years. The euro area has been gathering speed since 2015. The European Commission’s economic-sentiment index is at its highest since 2011; euro-zone unemployment is at its lowest since 2009.

The bellwethers of global activity look sprightly, too. In February South Korea, a proxy for world trade, notched up export growth above 20%. Taiwanese manufacturers have posted 12 consecutive months of expansion. Even in places inured to recession the worst is over. The Brazilian economy has been shrinking for eight quarters but, with inflation expectations tamed, interest rates are now falling. Brazil and Russia are likely to add to global GDP this year, not subtract from it. The Institute of International Finance reckons that in January the developing world hit its fastest monthly rate of growth since 2011.

This is not to say the world economy is back to normal. Oil prices fell by 10% in the week to March 15th on renewed fears of oversupply; a sustained fall would hurt the economies of producers more than it would benefit consumers. China’s build-up of debt is of enduring concern. Productivity growth in the rich world remains weak. Outside America, wages are still growing slowly. And in America, surging business confidence has yet to translate into surging investment.

Entrenching the recovery calls for a delicate balancing-act. As inflation expectations rise, central banks will have to weigh the pressure to tighten policy against the risk that, if they go too fast, bond markets and borrowers will suffer. Europe is especially vulnerable, because the European Central Bank is reaching the legal limits of the bond-buying programme it has used to keep money cheap in weak economies.

The biggest risk, though, is the lessons politicians draw. Donald Trump is singing his own praises after good job and confidence numbers. It is true that the stockmarket and business sentiment have been fired up by promises of deregulation and a fiscal boost. But Mr Trump’s claims to have magically jump-started job creation are sheer braggadocio. The American economy has added jobs for 77 months in a row.

No Keynes, no gains

Most important, the upswing has nothing to do with Mr Trump’s “America First” economic nationalism. If anything, the global upswing vindicates the experts that today’s populists often decry. Economists have long argued that recoveries from financial crashes take a long time: research into 100 banking crises by Carmen Reinhart and Kenneth Rogoff of Harvard University suggests that, on average, incomes get back to pre-crisis levels only after eight long years. Most economists also argue that the best way to recover after a debt crisis is to clean up balance-sheets quickly, keep monetary policy loose and apply fiscal stimulus wherever prudently possible.

Today’s recovery validates that prescription. The Fed pinned interest rates to the floor until full employment was in sight. The ECB’s bond-buying programme has kept borrowing costs in crisis-prone countries tolerable, though Europe’s misplaced emphasis on austerity, recently relaxed, made the job harder. In Japan rises in VAT have scuppered previous recoveries; this time the government wisely deferred an increase until at least 2019.

The tussle over who created the recovery is about more than bragging rights. An endorsement for populist economics would favour insurgent parties in countries like France, where the far-right Marine Le Pen is standing for president. It would also favour the wrong policies. Mr Trump’s proposed tax cuts would pump up the economy that now least needs support—and complicate the Fed’s task. Fortified by misplaced belief in their own world view, the administration’s protectionists might urge Mr Trump to rip up the infrastructure of globalisation (bypassing the World Trade Organisation in pursuing grievances against China, say), risking a trade war. A fiscal splurge at home and a stronger dollar would widen America’s trade deficit, which may strengthen their hand. Populists deserve no credit for the upsurge. But they could yet snuff it out.