The right to self-determination of peoples lies at the core of much global disquiet.Disputes over the practical meaning of the right for all peoples to “pursue theireconomic, social, and cultural development without outside interference” can lead todomestic conflicts that harden over decades and others capable of enflaming geopoliticalcrises.I address these disputes by returning to the conceptual history of collective self-determinationcentering on two sources of contestation: first, who or what authorizesthe political existence of a “people” to whom self-determination can apply; and second,the physical and discursive spaces that shape and limit the realization of selfdetermination. I refer to these considerations as the “authorship of collectivepersonhood.”My analysis identifies four interpretations of self-determination that differentlyunderstand the authorship of collective personhood: national, international, global, andintrastate. The national understanding, emerging from 19th-century Europeannationalist revolutions, sees political legitimacy as stemming from a nation’s attainmentof statehood through liberation from external domination, as exemplified in the thoughtof Giuseppe Mazzini. International self-determination, which arose in the early 20thcentury, involved the creation of peoples in line with the ideological and geopoliticalinterests of external actors, as epitomized by the policies of Vladimir Lenin andWoodrow Wilson. The mid-20th-century global conception of the “right” to self-determinationaimed to achieve decolonization through independent statehood, viewingthe world as a site of war and peace, universal racial dynamics, and shared colonial“dependency.” Lastly, the intrastate transformation of self-determination ischaracterized by minority and indigenous peoples establishing their political identitywithin existing states through negotiations over self-governance over issues central tomaintaining their collective cultural identity.These interpretations demonstrate how self-determination has accumulateddiverse meanings, fueling contemporary conflicts as stakeholders invoke coherent,historically grounded understandings to assert their perceived entitlements. However,despite the challenges posed by this plurality of meanings, I defend an indeterminateunderstanding of self-determination. Embracing the malleability of self-determinationis essential to ensure the enduring relevance of the notion to proffer a resilientframework for asserting autonomy amidst future, unforeseen challenges to collectiveidentity and ways of life.