In this bold intervention, Cudworth and Hobden draw on recent advances in thinking about complexity theory to call for a profound re-envisioning of the study of international relations. As a discipline, IR is wedded to the enlightenment project of overcoming the 'hazards' of nature, and thus remains constrained by its blinkered 'human-centred' approach. Furthermore, as a means of predicting major global-political events and trends, it has failed consistently. Instead, the authors argue, it is essential we develop a much more nuanced and sophisticated analysis of global political systems, taking into account broader environmental circumstances, as well as social relations, economic practices and formations of political power. Essentially, the book reveals how the study of international politics is transformed by the understanding that we have never been exclusively human. An original work that is sure to provoke heated debate within the discipline, Posthuman International Relations combines insights from complexity theory and ecological thinking to provide a radical new agenda for a progressive, twenty-first century, International Relations.