Why can no one win a trade war? WTO warns tariffs and trade blocs could hurt everyone

The WTO announced new modelling results that illustrate the economic fallout of a world split into rival trade blocs, warning that such a scenario would leave no clear winners and could severely depress global output. Chief Economist Rob Staiger emphasized that the multilateral trading system is at a critical juncture, facing pressures from shifting economic power, heightened government intervention, digitalisation of trade, and rising geopolitical tensions.

The study projects that under a moderately fragmented future, global GDP in 2050 would be 5.1% lower and exports 18.6% lower than in a more cooperative framework. In a worst‑case outcome where the WTO is replaced by a patchwork of free‑trade agreements, GDP could fall 6.9% and exports shrink by almost 27%. Conversely, a scenario with stronger multilateral cooperation could lift global GDP by 2.9% and raise exports by roughly 18%. The report follows a March ministerial meeting in Yaounde, Cameroon, where 166 WTO members failed to agree on reforms, prompting renewed negotiations in Geneva on decision‑making, dispute settlement, subsidies and state intervention.

Trade tensions have intensified as countries resort to tariffs, subsidies, export controls and industrial policies to safeguard domestic interests, disrupting supply chains and diverting trade from the most efficient producers. The modelling indicates that least‑developed countries stand to gain the most from a cohesive trading system but would also suffer the steepest losses if trade becomes fragmented along geopolitical lines. While regional and sector‑specific agreements are growing, the WTO cautions that they must complement rather than undermine the multilateral framework to avoid deepening global economic fragmentation.