To understand it, start with something simple. When you are frightened, you spend differently. You spend more on locks, alarms, guards—and less on books, gardens, and savings. Nations behave the same way. A country that feels threatened allocates its budget accordingly. In lower- and middle-income countries, a 1% increase in military expenditures as a share of GDP is associated with a near equal reduction in health expenditure. The school that was not built, the hospital that was not staffed, the road that was not paved—these are the hidden costs of the Fear Tax.