Javier Milei has started his libertarian economic experiment to transform Argentina. In a series of dispatches, The Telegraph’s World Economy Editor, Ambrose Evans-Pritchard, travels through what used to be one of the world’s richest nations to examine whether “shock therapy” can work. Argentina’s repudiation of the Brics is more than a minor earthquake in global diplomacy. It has broken the spell of an ever-widening bloc of states pitted against the Western liberal order. Momentum has been all one way since the original quartet of Brazil, Russia, India and China launched the bloc in 2009, later expanded to South Africa, and then Iran, Saudi Arabia, Egypt, Ethiopia and the Emirates at the start of this year. Finally, a country from the Global South – a tortuous ideological construction – has pulled back from a grouping that is increasingly a front for Xi Jinping’s expansionist China, and for the creation of a Chinese-run financial system aimed at displacing the Bretton Woods institutions. A defector has repositioned itself as a stalwart member of the liberal democracies and the US military alliance, without ifs or buts, as a matter of moral and philosophical preference, and at some risk to its immediate economic interests. “The West is in...