Well, Rosacrux, though I agree Mongols burnt a whole lot of cities, killed a huge number of people, I have to disagree about the fact they were less civilised than other.

Just have a look at the muslim conquest, it was the exact same thing (in lesser proportion). Muslims burnt cities, destroyed whole civilisations (Sassanid Persia ? Copte Aegyptia ?) killed a whole lot of innocents, and almost destroyed the Eastern Roman empire, though eventually they built the most advanced civilisation around mediterranea. However, can we say that they were not civilised ? Obviously not.
They took the best part from each civilisation they conquered, and that's what allowed them to be more advanced than christians.
Basically, that's what Mongols have done 800 years laters.

I don't want to be annoying or what, but I think you're opinion is kinda biased.
My sources might be wrong (though I doubt it), but I've read a lot of books on that topic. Many christians or muslims travellers (Marco Polo being one of them) who visited mongols' territories were simply astonished by their culture and their way of life.

And as I said in my previous post, (and from what I've understood from my readings) Mongols thought they were superior to other peoples (that's mostly why they didn't care about killing loads of innocents if that would save one of them) and that they were supposed to rule over the whole known world. Is that what you would expect from an uncivilised culture ?