Not So Simple

China’s rise to the status of a global power is a very complex phenomenon. Yet students of international relations (IR) are taught that a good theory should be ‘parsimonious’, meaning that it should explain a lot with a little. In relation to China’s rise, the problem with theoretical parsimony may be not what it includes but what it leaves out. This article argues that lack of explanatory breadth and depth in connection with China’s IRs demonstrates a shortcoming in mainstream IR theories such as neorealism, offensive realism and constructivism. A candidate for an IR theory which explains more with more is complexity theory (CT), which utilises a conceptual toolkit including non-linearity, feedback effects, emergent properties and complex adaptive systems. CT’s toolkit, already used in the natural sciences, seems a good candidate to explain the hard-to-predict phenomena that emerge in the international sphere, but has not yet been developed into a clear theoretical lens in IR. In this article, the rise of China is analysed through the lenses of three mainstream theories and CT in order to assess the strengths and shortcomings of each approach and to suggest how CT’s ‘conceptual toolkit’ might be utilised to flesh out existing IR theories in order to explain China’s rise more fully.