Ergodicity is the idea that the outcome for a group aligns with the lifetime outcome of each individual within the group. A simple coin toss is an example of an ergodic system - the results will always tend towards 50% heads and 50% tails, regardless of whether one person flips the coin 100 times, or 100 people flip the coin once. However, when it comes to decision making, it’s human nature to assume that everything is ergodic. But in reality, most human systems are non-ergodic. During the COVID-19 pandemic, for example, that the average number of ICU beds in a country were above some threshold did not mean that all hospitals could handle a local outbreak. In many cases, local health professionals were overwhelmed with COVID-19 cases because public health administrators had assumed ergodicity where it did not exist.