This is the name given to those phenomena that unexpectedly end the lives of a large group of individuals. These situations range from epidemics and cataclysms to plagues and wars. Part of the progress of humanity and its perpetuation as the species at the top of the food chain is due to the fact that, thanks to the fact that it has been able to learn to control the progress of epidemics, to mediate diplomatically to put an end to armed conflicts, in addition to designing sophisticated prediction models when a natural disaster may affect a certain region. All this to prevent mortality; the loss of a valuable community that can contribute significantly to the development of the planet.

Currently, in poor countries and regions (with few technological advances), it is possible that hundreds of people die due to a harsh climatic phenomenon, as in the case of the Horn of Africa, where a severe drought hits the countries of that territory, causing poverty, malnutrition and thousands of deaths. Armed conflicts, likewise, can be unleashed at any time, which would lead to a rapid increase in death rates. In general, the most susceptible population is that of the female gender and children, since they tend to be more easily affected by the tragedies that may occur.

Finally, it is important to highlight that, according to what is expressed in the RAE Usual Dictionary, the word mortality cannot be used as a synonym for mortality, since the latter refers to deaths that occurred in a certain period of time.