Humans have, since time immemorial, contested over territory and, given its connection to resource access, attached great importance thus. Contestation over territory, especially when it is of significant scale, typically occurs via group-level articulation rather than individual. Such claims are all too often rooted in, legitimised by, and resisted on the grounds of, the ethnicity of the group(s) in question—hence ethno-national conflict. Indeed, conflict between ethnic groups, be it violent or non-violent, while not a constant, has been a frequent feature of our modern age. This article aims to identify the key contributory factors that sit behind ethno-national conflict. Particular attention will be paid to factors spanning across categories that hold a considerable amount of explanatory sway, namely, structural, political, and economic. However, light attention will also be given to ‘other factors’ such as those that fall within environmental and cultural categories. For all the contributory factors identified, supportive empirical evidence will be used to demonstrate their relative value.