The comparison also includes World War II, with an estimate of between 70 and 85 million dead, and the communist famine caused by the Great Leap Forward in China, between 1958 and 1962, with between 30 and 45 million victims.
In other cases, the document records between 15 and 22 million deaths for World War I and approximately 17 million victims for the totality of the killings perpetrated by the Nazi regime. Within this last figure, it estimates around 6 million Jews murdered during the Holocaust.
Based on these figures, the report argues that the accumulated volume of abortions-related murders estimated over the last five decades reaches a scale that exceeds even 20 times the total mortality balance of all wars in history.
The abortion calculations cited in the document are primarily based on research by Bearak et al., published in Studies in Family Planning and The Lancet Global Health, in addition to earlier works by Henshaw and Sedgh et al.
For historical comparisons, research and records from Eckhardt, M. White, Yang Jisheng, Dikötter, and the United States Holocaust Memorial Museum are used.
