There will be pressure on rich countries to fulfil a commitment to provide climate finance to poorer nations

The run-up to this weekend’s G20 summit in Delhi has largely been dominated by two issues: the host’s efforts to project India as a superpower; and the intriguing decision of Xi Jinping not to attend. The substance of what world leaders will discuss during their two days together has struggled to surface.

Yet this year’s G20 – the 24th since the format was inaugurated in 1999 – is potentially a make or break moment for the organisation that includes the world’s 19 wealthiest nations plus the European Union as a bloc. With one part of the world increasingly gathering in the now expanded Brics format where China has a leading role, and the west comfortable with its annual G7 summitry, the G20 is the best remaining hope of keeping the principle of multilateralism alive. The United Nations secretary general, António Guterres, spoke on Thursday of a real risk of fragmentation of the world order, while his own organisation is paralysed by the war in Ukraine.