Compare Events

How to read this comparison

Pick two to four events from the archive (pandemics, wars, genocides, famines and nuclear disasters) and the comparator puts them on the same scale: estimated deaths, share of the world population of their time, duration, period and each event's timeline. It answers questions that isolated numbers can't, such as whether a modern pandemic was more or less devastating than a medieval one relative to the world that lived through it.

Estimated deaths: always a range

Almost no event before the twentieth century has an exact count. The figures shown are the central estimate from the historical and demographic literature; each event's page also shows the full range, from the lowest to the highest estimate. Compare orders of magnitude, not decimals: a 10% difference between two historical estimates is usually within the margin of error.

Why the share of population matters

The world population has grown from a few hundred million in the Middle Ages to more than 8 billion today. That is why absolute figures favour recent events: the same number of deaths weighed far more in a smaller world. The percentage divides estimated deaths by the estimated world population at the time of the event, and it is the fairest metric for comparing different eras.

Duration and timeline

Duration runs from the first to the last year of the event; for pandemics that are still ongoing it counts up to today. A short, very lethal event and a long, persistent one can add up to similar tolls with opposite stories: each timeline shows how deaths were distributed over time.

Honest limits

Comparing is not ranking suffering. Direct deaths do not capture long-term consequences — displacement, later famines, health effects across generations — and the categories mix very different causes. Use it for context, not as a verdict.

More context: methodology and sources · the deadliest events in history · every event in the archive · statistics