In a new verbal escalation, Donald Trump, elected president of the United States, has shaken global markets. Indeed, he has threatened to impose 100% tariffs on the nations of the BRICS alliance. This statement comes in a tense economic context, where the dollar, a cornerstone of international trade, is increasingly being challenged by emerging powers. Such a challenge to the monetary status quo could well reshape the global geopolitical balance, but also lead to significant economic turbulence.