A defining story of this decade has been a series of global economic shocks: pandemic, war and geopolitical shifts. New research quantifies a rising set of vulnerabilities for the global trade system.The big picture: Many crucial global goods are built on supply chains that have one or more Achilles' heels, a report from the consulting firm McKinsey finds — a critical input, concentrated suppliers and geopolitical strain.That manifests partly in physical chokepoints.