Middle powers need to tread skilfully around the biggest blocs, writes Yvette Cooper https://www.economist.com/by-invitation/2026/04/24/how-to-think-about-foreign-policy-in-the-new-geoeconomic-era?taid=69ebb0e14d704800016308bc&utm_campaign=trueanthem&utm_medium=social&utm_source=voante