Both at home and abroad, labor is the ghost in the machine. The supply chain is really just people, running sewing machines or loading pallets or picking tomatoes or driving trucks. Sometimes, it’s people in the workforce bubbles of foreign factories, eating and sleeping where they work, so companies can keep manufacturing sneakers through a Delta outbreak. The pandemic has tied the supply chain in knots because it represents an existential threat to the lives of the humans who toil in it. The fact that Americans now can safely go on vacation does not mean that people half a world away can safely make new bathing suits for them. The normalcy sought by consumers was created by all of this hidden work, and that normalcy has always been threatened by dangerous working conditions. No one can expect things to go smoothly until everyone is protected.