Crucial systems across the world collapsed on Friday, triggered by one mistake in a single company. The CrowdStrike outage hit banks, airlines, and health-care systems. It may end up being the worst information-technology disaster in history.This was not, however, an unforeseeable freak accident, nor will it be the last of its kind. Instead, the devastation was the inevitable outcome of modern social systems that have been designed for hyperconnected optimization, not decentralized resilience. W...