Qing dynasty

In 1644, the Manchus took over China and founded the Qing dynasty. The Qing weren't the worst rulers; under them the arts flowered and culture bloomed. Moreover, they attempted to copy Chinese institutions and philosophy to a much greater extent than then the Mongols of the Yuan. However, in their attempt to to emulate the Chinese, they were even more conservative and inflexible than the Ming. Their approach to foreign policy, which was to make everyone …

…the other hand, they did do their best to prop up the ailing Qing, the most notable example being the crushing of the Boxer Rebellion in 1900 by foreign troops (primarily U.S. Marines). What the Western powers were interested in was the carving up of China for their own purposes, and that, paradoxically, required keeping China together. But things happened to prevent that. First, in 1911, the Qing dynasty collapsed and China plunged headlong into chaos.