Multipolarity gives middle powers more choices, but fewer guarantees

At the Shanghai Cooperation Organisation (SCO) summit in Bishkek this week, Iranian President Masoud Pezeshkian received precisely the kind of political support he had hoped for. The SCO condemned the military attacks against Iran, described them as violations of international law and the UN Charter, reaffirmed Iranian sovereignty and territorial integrity, and called for the conflict to be resolved through political and diplomatic means.But the organisation did not offer to defend Iran. That distinction between political solidarity and collective defence is important. It tells us something not only about the Iranian experience with the SCO, but about the international order that is emerging around it.For years, discussions about multipolarity have often suggested that the US-led international system would gradually be challenged by an alternative bloc centred around China, Russia and organisations such as BRICS and the SCO. From the perspective of middle powers, joining both institutions seemed to fit neatly into this transformation. Integration into non-Western organisations was supposed to make them less vulnerable to Western isolation and pressure.The US-Israeli war on Iran has...