America’s manufacturing Achilles’ heel: McKinsey’s warning on rare earths grows louder

The story of Achilles doesn’t begin with an arrow. It begins with a mother who thought she could engineer invulnerability. Thetis dipped her infant son in the River Styx to make him immortal, holding him by the heel — the one place the water never touched. Achilles grew up to be the greatest warrior of his age, his armor impenetrable, his enemies routed. Nobody worried about the heel. Why would they? Everything else worked so well. America’s industrial story follows the same arc. Decades of semiconductor leadership, unmatched aerospace manufacturing, the most sophisticated defense supply chain in history — and, running beneath all of it, a single exposed tendon. Rare earths: the 17 chemically similar elements that make electric motors spin efficiently, that keep missile guidance fins stable at supersonic speeds, that sit inside every F-35, every EV drivetrain, every wind turbine nacelle. For years, nobody worried much about them. Everything else worked so well. McKinsey & Company analysts have spent the past several years tracing the outline of the wound. The firm projects a shortfall of up to 30% in magnetic rare earth supply globally by 2035 — unless China dramatically expands output or the rest of the world sharply accelerates production. For dysprosium and terbium, the heavy rare earths that prevent magnets from demagnetizing inside electric motors and missile guidance fins, the numbers are worse: producers outside China are projected to meet less than 20% of global demand for those two elements by 2035. Similar estimates come from CRU Group and Benchmark Mineral Intelligence. The river Thetis used wasn’t magic. It was strategy. How China came to dominate Rare earths aren’t particularly scarce in the earth’s crust — the name is a misnomer. What makes them irreplaceable is that they are nearly impossible to separate cleanly from one another and from surrounding rock. The chemistry required is toxic, expensive, and technically demandi