Thomas Piketty Professor at EHESS and the Paris School of Economics. The American president wants the 'Pax Americana' to be sustained by tribute payments from the rest of the world in order to endlessly fund US deficits. But with American power already in decline, we must begin to imagine a world without it, the economist writes in his column. The United States is no longer a reliable country. For some, this is nothing new. The Iraq War, launched in 2003 – resulting in over 100,000 deaths, lasting regional destabilization, and the return of Russian influence – had already shown the world the wrondoings of American military hubris. But the current crisis is new because it challenges the very core of the country's economic, financial, and political power. The US appears disoriented, led by an unstable and erratic leader with no democratic counterweight.