--- - |2 Abstract Moral reasoning is the most common approach to secession in political philosophy. Just‐cause, choice and liberal‐cultural theories rely on moral conceptions of political authority. This article examines an alternative view through an exploration of moral theories of secession from a realist perspective. Realism has recently seen a revival as a form of normative political philosophy and focuses on political disagreement and legitimacy rather than rights and moral analysis. I claim that realism would reject utopianism and moralism present in theories of secession. Instead of regarding secession as a right, realism would frame secession as a political option. According to this view, this article explores a realist theory of secession that would be based on the priority of politics and disagreement among other concepts. This would be a middle‐ground theory, compatible with liberal values and existing moral theories. - 'Nations and Nationalism, EarlyView. '