Something to do with culture? Something to do with population levels? Something to do with the crops being grown?
Something to do with culture? Something to do with population levels? Something to do with the crops being grown?
China has mountains around the edges, and had a hell of a time conquering the little kingdoms that were in them. In most cases, the best they managed was tribute, and never really established real administrative control.
There are very valid reasons for China wanting that territory in their country (security, resources, etc...) and its not like the west + Russia were playing a "Great Game" there just a century ago. China gets the territory because they took it and were able to hold it, plain and simple, it doesn't need a flaky moralistic reason.
Many Tibetan exiles are rather fond of "minority in our own homeland" claims which are true only if you define the homeland as covering areas not ruled over by Tibetans for centuries though :)
My best guess is that they were able to do this thanks to the advancement required to face off the threads before their eventual rise. There wasn't anybody who could really compete with what they had after those wars were won. The Pax Romana held relative peace in Europe because of that strength.
I'd love someone with more knowledge on the subject to come and answer this - really fascinating subject.
Lots of modern europe was never touched by the Roman Empire because it was too far from the water.
Geography alone doesn't really explain China's early unification, since they had more barriers than Europe to deal with. My hunch is that it is more of a fluke in history that could have happened in Europe also (and did with the Romans).
Warring state periods did occur during history, but stable and strong political unions were the norm in most of the dynasties.
I think spread out over enough time, these pervasive environmental factors do have a real influence. You could see the unity of the Roman Empire as being Europe's fluke, and the disunity of the Warring States as being China's.
But again, it's really all speculative.
You'll notice on maps like this one [1] that only some of the parts of "China" are colored in throughout history. Well, what about the uncolored parts? People lived there too, and organized themselves into groups with governments and so on. We don't bother with them though because some modern government just washes all of them away into the dustbin of history.
In a similar fashion, most people don't consider the Eastern Roman empire "Rome" after the fall of the Western Empire. But it was no more or less "Rome" than say, the Eastern Jin was.
Even today, China isn't unified, Taiwan operates as an independent entity.
1 - https://upload.wikimedia.org/wikipedia/commons/5/54/Territor...
The English realized this, so whenever some country like Spain or France threatened to conquer the rest of Europe, England would put its military strength on the other side to prevent this from happening.
Which also applied to countries and why Western Europe kept going from a unified empire to a bunch of countries. The last time this happen was in 843 "When Louis the Pious died in 840, his eldest son, Lothair I, claimed overlordship over the whole of his father's kingdom .../... Lothair's brother Louis the German and his half-brother Charles the Bald refused to acknowledge Lothair's suzerainty and went to war against him. .../... after which Lothair became willing to negotiate a settlement." (2).
1: https://en.wikipedia.org/wiki/Historical_inheritance_systems...
Europe, especially preindustrial, was forests and Alps and Pyrenees. A lot of trees in Germany. Italy is hilly.
Also, China is unified by language. At least the written kind that lets you run a bureaucracy. The med had a bunch, Latin, Greek and Arabic, and was multiple "countries" for a good long time.
About the crops being grown, there's ideas about the difference between rice and the middle eastern crops. Something to do with the fact that rice requires constant attention whereas med crops are intensive only during harvest. Not too familiar with that line of thought.
In contrast Europe has a lot of rivers, mountains and forrest dividing the lands naturally.
E.g. you can see this replay itself at every level, e.g. within Scandinavia, flat Denmark had a stronger central government than Sweden early on. While e.g. my home country Norway full of fjords, rivers and forests always had very weak central power. Nobody could easily hold such a country.
I think the good part of that though is that such a situation foster democracy. These large plain countries always seem to end up strong but autocratic. I don't think there is any accident that Russia lagged behind the rest of Europe in freedom and development of democracy.
Switzerland is another example of a mountain country with strong democracy traditions and also historically very hard to keep control over by central powers.
Now China does of course have lots of maintains as well, but it matters how they are distributed. They still got quite large plains. I think there was a simulation ran, which simulated the creation of empires just based on geography and China was far more likely to produce empire's with its geography than Europe.
If you check out the Wikipedia article about Chinese history as a starting point, you will see that there have been many periods in which 'China' does not exist. Instead, there were several kingdoms, many different states, or there was only a single state but one could definitely put forth an argument that 'China' is not a direct descendant of that ancient entity.
Granted, the extent of fractionalisation regarding both time and geography might be less than in Europe, but it is far from some imagined 'continuued' existence of a Han Chinese state.
If you include places like Tibet, Guangdong, Taiwan, Manchuria and Xinjiang in this debate, this rings even truer.
European territory made external travel (around the coastline) quite easy (good for invaders, hard for defenders to move to where the attackers are).
China's geography had a much smaller coastline (relative to landmass), and a far superior interior river network, augmented early (~1,000 BCE IIRC) with manmade canals, making internal movement of forces far easier. China also wasn't surrounded by capable enemies -- India was the nearest significant civilisation. The Mongols managed to invade, yes, but they were a fluke and also managed to occupy nearly all the Eurasian landmass, from the Pacific to central Europe and India. (The Mughal Empire was the result of Mongol invaders of India.)
China did see internal strife, but those splits resolved with a resumption of the previous Chinese bureaucracy rather than a replacement of it, as seemed more typical of Europe.