Donald Trump is moving rapidly to change the contours of contemporary international affairs, with the old US-dominated world order breaking down into a multipolar one with many centres of power.
The shift already includes the US leaving the World Health Organization and the Paris Climate Accords, questioning the value of the United Nations, and radical cuts to the US Agency for International Development (USAID).
Such a new geopolitical age also involves an assertion of raw power, with Trump using the threat of tariffs to assert global authority and negotiating positions.
