The defeat of Donald Trump in November 2020 followed by the attack on the US Congress on 6th January 2021 represented a tipping point moment in the history of the American republic. Divided at home and facing a world sceptical of American claims to be the 'indispensable nation' in world politics, it is clear that the next few years will be decisive ones for the United States. But how did the US, which was riding high only 30 years ago, arrive at this...