We have returned to a period of risk, one rife with the sort of pressures that have led to major financial crises. This time, the risks are spread across industries, markets and nations: artificial intelligence, the roughly $2 trillion private credit industry, stock markets, Taiwan and now Iran. These risks are analyzed one by one, news article by news article. We understand them in isolation. Yet they are different entry points into the same underlying structure — a complex and tightly coupled system where the specific source of stress matters less than how quickly that stress can spread.