Here is one of the more conservative estimates, putting 40 million on Genghis Khan’s account, which suffices to establish the original claim. (The total for World War II is somewhat higher, but includes all theaters of the war—and is of course much smaller as a fraction of people alive at the time.) Higher end estimates are necessarily less precise, but I’ve seen it suggested that the Mongol invasion of China alone may have caused up to 60 million deaths (out of a total population of 120 million) once the famines resulting from disruption of agriculture are fully accounted for.
Here is one of the more conservative estimates, putting 40 million on Genghis Khan’s account, which suffices to establish the original claim. (The total for World War II is somewhat higher, but includes all theaters of the war—and is of course much smaller as a fraction of people alive at the time.) Higher end estimates are necessarily less precise, but I’ve seen it suggested that the Mongol invasion of China alone may have caused up to 60 million deaths (out of a total population of 120 million) once the famines resulting from disruption of agriculture are fully accounted for.
Thank you.