This article examines constitutionalism and legal order in Nigerian transitions from a theoretical framework perspective. Not applicable as this is a theoretical framework article. Theoretical analysis will be employed to explore existing literature and conceptualize key insights into Nigerian legal dynamics. This theoretical framework underscores the critical role of constitutionalism as a safeguard for the rule of law in Nigeria, highlighting the need for balanced governance between legislative and judicial branches to ensure stable transitions. Policymakers should prioritise measures that enhance the independence and accountability of the judiciary, alongside fostering more inclusive legislative processes to uphold the constitution's integrity during political transitions.