What Multilateralism Looks Like After US Decline

The current crisis in the world order isn’t just about Donald Trump ignoring multilateral institutions. The US has long broken the rules — the real change is that Washington is losing its ability to lay down the law to other states.

Brazilian President Luiz Inácio Lula da Silva meets with Donald Trump at the White House in Washington, DC, on May 7, 2026.

The hefty US tariffs on Brazilian exports are another sign of Washington’s will to punish its political adversaries. But resisting such moves will take more than appeals to the spirit of multilateralism. (Ricardo Stuckert / Handout / Anadolu via Getty Images)


Brazil’s President Luiz Inácio Lula da Silva responded with justified defiance to recent confirmation that the United States government would impose a 25 percent tariff on Brazilian exports. Among the “acts, policies, and practices” that the Office of the United States Trade Representative deemed “unreasonable or discriminatory” and worthy of formal investigation, it cited Brazilian electronic payment services. The Trump administration has frequently denounced Pix, an instant payment mechanism maintained by Brazilian banks without intermediation by US firms such as Visa and Mastercard. However, the imposition of these tariffs is also one of a growing number of measures aimed at undermining Lula’s government ahead of elections in October, as the United States seeks privileged access to Brazil’s abundant source of rare earth elements. A spokesperson for the Brazilian president questioned the legitimacy of the investigation, stating that it was “not based on multilateral trade rules.”

But there is a bigger problem. While national governments still invoke such rules in defense of their sovereignty, the conditions that enabled the expansion of multilateralism in the twentieth century no longer exist. Though the Trump administration’s brazen disregard of international norms and institutions might intuitively be identified as evidence of this, it is not the most important indicator: after all, it is the prerogative of hegemonic power to circumvent universal rules while policing others’ adherence to them. Of more consequence is the United States’ apparent inability to reshape these rules in accordance with its own evolving geostrategy. And as Washington has eschewed multilateralism, its global preeminence in the exercise of coercion has also waned. Given the effective absence of the United States from existing multilateral institutions, attempts to give them new meaning – not least by revisionist states such as China and Russia – have been used to undermine American hegemony itself. But as Donald Trump paints the world with new targets, adversaries of circumstance as well as systemic rivals are also responding in kind.

Economic Warfare

Particularly indicative, in this regard, are changes in the conduct of economic warfare. The US dollar has been the global currency of reference since the Bretton Woods Agreement of 1944, allowing Washington unique control over international flows of capital and commodities. Through the imposition of distinct forms of “blockade,” from sanctions to tariffs to maritime sieges, the United States has conditioned economic relations in a manner that, for a time, served to produce a system of consent to its imperial power. However, such measures have forced actions that have ultimately contributed to the erosion of its global hegemony. Under the strain of American sanctions, for example, Russia, Iran, and Venezuela have pursued de-dollarization strategies, settling trade in other currencies, yuan in particular. Yet as noted recently by historian Nicholas Mulder, many states have responded to growing coercion from Washington by developing “not just evasion routes but economic counter-weapons of their own.”

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