Is Ghengis Khan responsible for causing more death then Adolf Hitler or Josef Stalin?
I read about how in one city Ghengis captured, he had all of the prepubescent young girls brought in to a public square and publicly raped. He also once forced men and women who were related to rape each other or be put to death, according to the secret history of the mongols. Sorry that I do not know the names of these cities in questions, I am not a historian.
This is a really hard question OP, and I hope I am not violating subreddit rules for saying that you really have to specify what would have to happen for them to be responsible for those deaths. Do you mean, caused by the government they administer? In Genghis Khan's case, caused by his sons off in Baghdad or China while he was in Mongolia? Caused by blowback from the animosities churned up by his armies' passing?
Also, to ask, where did you read these things about Genghis Khan? I have not read anything in the historical literature that would support those things he was purported to do.
Disclaimer: Not a historian, but I think I can answer this one.
The short answer is: we don't know.
The long answer:
Obviously we need to first define what qualifies as Genghis doing the killing. As /u/TezzMuffins puts it:
you really have to specify what would have to happen for them to be responsible for those deaths. Do you mean, caused by the government they administer? In Genghis Khan's case, caused by his sons off in Baghdad or China while he was in Mongolia? Caused by blowback from the animosities churned up by his armies' passing?
I think that any way you try to slice the pie of the Mongol Empire, you still end up with no definitive answer as to how many people were killed. An excerpt from Tamim Ansary's "Destiny Disturbed":
the Muslim historian Sayfi Heravi said the Mongols killed 1,747,000 when they sacked the city of Naishapur, killing everything down to cats and dogs. At the city of Herat, he put the toll at 1,600,000. Another Persian historian, Juzjani, claimed that 2,400,000 died in Herat. Obviously these numbers are inflated. Herat and Naishapur could not possibly have had anywhere near this number of inhabitants in the 1220s.
See, the issue is that we are dealing with bad numbers. These bad numbers are coming from those that were living at the time of the attack, and were historians. If these men cannot create anywhere near a realistic number for total deaths, it is ridiculous to think that we can come up with an accurate number.
When combining numbers that are most likely not very accurate, and try to add them up for every battle fought by the Mongols (many of which were probably not recorded), it would be a massive waste of time. Where as there was more modern technology during WW2 in Germany and the Soviet Union - especially for tracking population - that technology did not have any existence during the time of Genghis Khan in the 13th century.