And the end started when China was admitted to the WTO. They had this huge cheap labor force, a government that could centrally plan (in addition to ignoring little things like environmentalism or rights), and an immense wealth of resources. It was like a bunch of sheep letting a baby wolf into the barn. Now the wolf's all grown up.
So you think they could have been kept poor and isolated forever?
What's wrong with giving billions of people chance to develop their country and experience better life? China is not "a wolf".