IR proceeds on a Eurocentric ontological assumption that sovereignty has universal validity today. How can IR be decolonised, when in spite of countless examples of the enactment of ‘sovereignty otherwise’, the discipline remains unconcerned with the fact that the logic of sovereignty remains uni-versal. The question is as much political as it is intellectual, because as a discipline, we have allowed the inertia of our professional rhythms to marginalise pluri-versal sovereignty, or the organisation of sovereignty along different ontological starting points. I argue IR must abandon its disciplinary love affair with uni-versal sovereignty. The tendency to ‘bring in’ new perspectives by inserting them into an already ontologically constituted set of assumptions works to protect IR’s Eurocentricity, which makes disciplinary decolonisation untenable. I propose that as a starting point, IR needs to be more mature about recognising the decolonisations that are happening under our very feet if we are to stand a chance at disciplinary level decolonisation. As an illustrative example, I explore an ongoing collision of settler-colonial and Mi’kmaw sovereignty through the issue of lobster fisheries in Mi’kma’ki, or Nova Scotia as the territory is known to Canadians.