This article offers a critical and wide-ranging review of extant theories of International Relations (IR). It suggests that, despite the ubiquity of the field and the abundance of research that has been undertaken over the past century, there remains a need for IR to accept and integrate new ways of thinking if it is to grapple successfully with emerging global challenges and also remain relevant to practitioners. In this spirit, some components of a more holistic way of understanding IR are suggested, and this in turn hints at a new agenda for research and practice with broader relevance.
