WTO chief warns tariff war could cut global GDP by 7%

The head of the World Trade Organization warned on Tuesday that the Trump administration's escalating tariff war threatens to fracture the global economy into rival trading blocs, with a potential 7% reduction in global GDP if the multilateral trading system continues to erode.

A Stark Warning From the WTO

Speaking at Semafor's The Next 3 Billion summit in New York, WTO Director-General Ngozi Okonjo-Iweala cited the organization's modeling showing that retaliatory tariffs could trigger a 20% collapse in global trade. At the same time, she argued that a systemic overhaul of the WTO could unlock $3 trillion in new economic output by 2050. The figures draw on the WTO's 2026 World Trade Report, released September 15, which found that failure to modernize the trading system could cost up to 10% of global GDP.semafor+1

Okonjo-Iweala acknowledged that global commerce has shown resilience, partly driven by the AI investment boom, with tech infrastructure trade accounting for over 40% of trade growth last year and roughly three-quarters of world trade still operating under standard WTO terms. "Just because the system is resilient doesn't mean it's robust," she said, warning that "if we don't do necessary reforms to the system, I think the rules could be further eroded".semafor

Lula Calls WTO on 'Life Support'

Hours earlier at the same venue — the opening of the 81st United Nations General Assembly — Brazilian President Luiz Inácio Lula da Silva offered a blunter assessment. According to AP, Lula told world leaders the UN was facing its "most critical" moment and that its credibility "has never been lower". He described the WTO as on "life support" and condemned the use of tariffs as "weapons of coercion and blackmail".breitbart+2

Lula declared that "Brazil doesn't fit in anyone's backyard," rejecting what he characterized as renewed hegemonic ambitions in Latin America. He noted that despite heavy tariffs on Brazilian exports, the country expects to break its export record this year.upi+2

A World Turning Away

The warnings come amid accelerating efforts by U.S. trading partners to reduce their dependence on American markets. Last week, the European Union invited Canada — facing 50% U.S. tariffs on billions of dollars in goods — to become the bloc's first-ever "associate member," a proposal that prompted Trump to threaten further tariffs on Europe. Canadian Prime Minister Mark Carney told European lawmakers that Canada and Europe should ally to protect their markets and democracies.cnbc+2

Okonjo-Iweala urged companies to look beyond traditional Asian supply chains and embrace a "China plus Africa" strategy for critical minerals. The reforms she outlined — breaking decision deadlocks, addressing unfair subsidies, and rewriting outdated trade rules — face steep odds. "The work has started. It's going to be tough," she said. "But I'm hopeful members now agree that status quo is not an option".semafor