Greater interpersonal trust was significantly associated with lower COVID-19 mortality for most of the pandemic. This corresponds to the theory that controlling pandemics requires large-scale cooperation and therefore potentially a high amount of trust among members of a society. People are more likely to adopt practices that might hurt or inconvenience the individual (such as staying home) but help the collective (by preventing the spread of a disease) if they believe that others would do the same. Therefore, a high level of interpersonal trust could feasibly be related to a country successfully coping with COVID-19.