It is this “exorbitant privilege” – as French statesman Valéry Giscard d’Estaing once sourly observed – that has been the bedrock of America’s post-war hegemony. It is the status of the dollar, above all, that’s allowed Washington to get its way, putting the financial squeeze on recalcitrant countries via the IMF while funding foreign wars. To understand politics and power it pays to follow the money. And for the past 70 years, the dollar has ruled the roost.