Dani Rodrik argues that China's currency policy has hurt other developing countries, but "we should not hold China responsible for taking care of its own economic interests":
Is Chinese Mercantilism Good or Bad for Poor Countries?, by Dani Rodrik, Commentary, Project Syndicate: ...Discussion of China’s currency ... is viewed largely as a US-China issue, and the interests of poor countries get scarcely a hearing... Yet a noticeable rise in the renminbi’s value may have significant implications for developing countries. Whether they stand to gain or lose from a renminbi revaluation, however, is hotly contested. ...
Strip away the technicalities, and the debate boils down to one fundamental question: what is the best, most sustainable growth model for low-income countries? Historically, poor regions of the world have often relied on ... exporting to other parts of the world primary products and natural resources such as agricultural produce or minerals. ...
But this model suffers from two fatal weaknesses. First, it depends heavily on rapid growth in foreign demand. When such demand falters, developing countries find themselves with ... a protracted domestic crisis. Second, it does not stimulate economic diversification. Economies hooked on this model find themselves excessively specialized in primary products that promise little productivity growth.
Indeed, the central challenge of economic development is not foreign demand, but domestic structural change. The problem for poor countries is that they are not producing the right kinds of goods. ... The real exchange rate is of paramount importance here, as it determines the competitiveness and profitability of modern tradable activities. When developing nations are forced into overvalued currencies, entrepreneurship and investment in those activities are depressed.
From this perspective, China’s currency policies not only undercut the competitiveness of African and other poor regions’ industries; they also undermine those regions’ fundamental growth engines. What poor nations get out of Chinese mercantilism is, at best, temporary growth of the wrong kind.
Lest we blame China too much, though, we should remember that there is little that prevents developing countries from replicating the essentials of the Chinese model. They, too, could have used their exchange rates more actively in order to stimulate industrialization and growth. True, all countries in the world cannot simultaneously undervalue their currencies. But poor nations could have shifted the “burden” onto rich countries, where, economic logic suggests, it ought to be placed.
Instead, too many developing countries have allowed their currencies to become overvalued... And they have made little systematic use of explicit industrial policies that could act as a substitute for undervaluation.
Given this, perhaps we should not hold China responsible for taking care of its own economic interests, even if it has aggravated in the process the costs of other countries’ misguided currency policies.
I don't think I have anything to say about this that hasn't already been said, many times, and I'm running behind at the moment, so I am am going to leave comments to you. One question might be whether or not rich nations are, in fact, obligated to pay part of the "burden" for the development of poorer countries. If so, why, and if not, why not?