For the moment, the author thinks that a bit of admiration is China's due. Every fault you can think of is simply swept away as the juggernaut surges on. This makes it tempting to think that China's constant rapid economic expansion is inevitable. The darker side of this is that constant rapid economic expansion is essential if China wishes to avoid major social unrest. In common with everything else about China's industrial revolution, the numbers involved strain credulity. The Chinese authorities plan to move between 300 million and 400 million people from the country to the cities by 2020. By that time the size of the economy is slated to increase by 250%. The obvious immediate threats to China's advance are then to its supply of raw materials and to the demand for its manufactures. Any serious pause in its rate of growth, and certainly any recession, may cause social tensions to boil over. This is where the one child policy may prove dangerous.