Thanks to Donald Trump, a new era of great power imperialism fuelled by authoritarianism and hyper-nationalism is unfolding

A torrent of abrupt US policy reversals, resets and revisions since Donald Trump returned to the White House last month has left America’s friends and enemies struggling to keep up. Trump’s desire both to upend and dominate the established international order, and in particular his undermining of the postwar transatlantic alliance, is feeding talk of a watershed moment akin to 1989, when the fall of the Berlin Wall signalled an end to the cold war.

His behaviour has strengthened a consensus, current among western politicians, diplomats and analysts, that the world is reaching a turning point, that the UN-led, rules-based, multilateralist system is crumbling, and that a new era of great power imperialism fuelled by authoritarianism, hyper-nationalism and left- and rightwing populism is unfolding.