6.8 The Northern frontier
The passing role of the Mongols in this intellectual drama brings us to yet another theme that first becomes prominent in Chinese history with the Ch'in, though in this case the timing may be somewhat fortuitous. This is the menace of the barbarians on the northern frontier. The key fact about the territory to the north of China was its suitability for pastoral nomads. This meant that there was little scope for the Chinese to expand in this direction; to conquer a nomadic society is a thankless task for a settled state, and the lands that nomads inhabit are normally unattractive to peasants. It is only in recent centuries that Manchuria and Inner Mongolia have become a real part of China, and not just an imperial fringe. So there was no northern equivalent to the ancient expansion of China toward the south. Instead, China confronted repeated military threats in this northern zone from the late third century B.C. onward. In the period of disunity following the demise of the Han dynasty, dynasties of barbarian origin from the north were established within the frontiers of China. There was more of this in the tenth century, and again in the twelfth. In the thirteenth century came the Mongol invasion, when for the first but not last time northern nomads conquered the whole of China. The Ming dynasty represented a proud restoration of native Chinese rule, but in the seventeenth century the Ming succumbed to yet another pastoral people from the north, the Manchus; it was they who established China's last imperial dynasty, the Ch'ing.
This sounds like a rather disastrous record, and from an ethnic Chinese viewpoint it was so. But a crucial feature of such nomadic conquests of China, whether partial or complete, was that the new rulers came to terms with Chinese civilization, and in general did so sooner rather than later. The major exception was the Mongols, who alone had a geographical perspective that made them aware of alternatives. So the Mongols for a while curtailed the role of the native Chinese elite and patronized a motley array of Tibetan lamas, Muslim tax collectors, and other miscellaneous foreigners. The Chinese detested the Tibetan lamas for their arrogance and the Muslim tax collectors for their rapaciousness, and in due course were glad to see the last of the Mongols themselves; but in the meantime, as we have seen, the Mongols had come to terms with the Chinese elite. From a military point of view China's northern frontier was more dangerous than India's northwestern gateway; but culturally China never experienced anything like a Muslim invasion from that quarter.