Having lived so historically recently, Hitler is rightfully held up as the height of evilness of mankind. Go back some 700 years, though, and Genghis Khan fit that description just as well. Both men are similar, having wrecked havoc on the population of Eurasia in a relatively brief, swift reign of terror.
While WWII was the deadliest war in history, with between 40 and 72 million deaths, the Mongol conquests come close, having result in between 30 and 70 million deaths. And by worldwide population, the Mongol conquests were much deadlier, 17% vs. 1-3% of living people having been killed.
List of wars and anthropogenic disasters by death toll - Wikipedia, the free encyclopedia
Each man committed genocide on an unprecedented scale, but today Genghis Khan enjoys an amount of notoriety, akin to that given to Alexander the Great.
So is one man more evil than the other? And if so, who?