@alexender,
I agree with some of what you said, but the "hot" versus "cold" climate thing mistakes the underlying cause and effects I think. The baseline issue is agricultural productivity -- the Nile Delta, the Mediterranean Basin, the Tigris-Euphrates, the Yangtze River Delta... these are just amazingly productive regions which supported lots and lots of people. They're warm, yes, but that's because they must be.
You know, it's quite amazing to think about, but Europe was being "settled" (in a very similar way to how the Americas were being "settled" post-1492) as late as 1200! Europe was truly a very sparsely populated place for much of its history; the feudal manor system has long been argued to be a sort of optimization scheme for managing clusters of small groups of people over large distances. That makes sense to me, and it also I think speaks to just how much harder it is to _thrive_ in cold climates than warm ones. That doesn't mean Europeans were smarter, just that Europe would be one of the last places to be settled -- and indeed, that seems to be historically the case.
@arbiter6,
As Trin Tragula said, India -- which inverts all the usual "this is why China's so big" arguments -- is, and always has been, basically just as big!
To me, that says there's nothing at all particular to "Chinese" people or "Chinese" civilization that's responsible for their very large scale.
@scholar,
Paragraphs are your friend.
Incidentally, I don't think China was MORE raped and pillaged than other non-European places... just, again, that the scales were always so much larger.
BUT, I will concede this: Europeans have had a bizarre fetish/fascination with "Cathay" since Marco Polo, if not earlier. I don't know why, but I do know it's heavily influenced European culture from way before the Imperial Age. If you ever read Renaissance literature, it's ripe with idealizations of China and the Ottoman Empire and the others. In that era, they believed these places to be super-advanced and super-wealthy and held them up as utopias compared to their backward, diseased, warring continent. Turned out they were just super-wealthy, so the Europeans took what they could.
And yes, it's rather interesting that an infusion of Christianity managed to spawn China's most devastating war...
@ Multiversal,
Don't want to out myself here but I've a healthy disregard for the Yale English dept
And it's a well-established archaeological fact that the largest cities in Europe were basically (1) Constantinople and (2) Cordoba. I'd also read about much larger cities than these much earlier in China, but I need to find a good reference.