Never knew you had such a list of articles on my favorite barbarian.
I watched a documentary once on the mass murderers of history. They ranked them by number of people killed, territory conquered and a long list of things. It seems Ghengis Khan came in low on the list of blood thirsty dictators because if a city/state surrendered he only killed off the ruling class. If they made him assault their city he killed everyone except a handful he pushed towards his next target. Chances were that next target surrendered without a fight.
Interesting fellow.
Interesting is one way to put it. :^)