Since helping to mitigate the global financial crisis, the G20 has degenerated from a platform for action to a forum for discussion. In the age of Donald Trump, it could sink even further, becoming a vehicle for legitimating illegal behavior, from Russia’s aggression in Ukraine to Saudi Arabia’s murder of a journalist... Now, instead of jostling for pictures of Trump and Xi, the world’s media will be dissecting interactions between MBS, accused of ordering the brutal torture and murder of the US-based Saudi journalist Jamal Khashoggi in the Saudi consulate in Istanbul, and Turkish President Recep Tayyip Erdoğan. Those between Russian President Vladimir Putin with German Chancellor Angela Merkel – which would have been uncomfortable even without the recent attack on Ukraine – will also be heavily scrutinized... None of this is the point of a G20 summit. What used to be an effective forum of global governance has now degenerated into a kind of Kabuki theater – a faithful reflection of the extent to which the global order has lost its way... After the global financial crisis erupted in 2008, the G20 acted as an international crisis committee, mitigating the disaster by injecting liquidity into markets worldwide. The effectiveness of the G20’s 2008 and 2009 summits raised hopes that, at a time of rapid change, this emerging platform, comprising economies accounting for 85% of world output, could serve as a global fire brigade. Not bound by procedural rules or legal strictures, the G20 could respond quickly when needed. There was even talk of the G20 intervening in a wider range of areas, potentially even eclipsing the United Nations Security Council.