In this episode, Lucas and Luna explore the political and social impact of the Constitutio Antoniniana—Caracalla's 212 AD edict granting Roman citizenship to nearly all free inhabitants of the empire. While often seen as a magnanimous gesture, the hosts uncover the cynical motives behind the law: a desperate need to tax new citizens to fund military campaigns. They discuss how this radical expansion diluted the meaning of citizenship, strained local economies, and accelerated the empire's shift toward a more uniform, but less privileged, legal status. Along the way, they touch on the legacy of Marcus Aurelius's own citizenship policies, the role of the Antonine Plague in reshaping demographics, and how Caracalla's decree set the stage for the crisis of the third century. The conversation also briefly addresses the murder of Caracalla's brother Geta and the damnatio memoriae that followed. Specific topics include the ius gentium, the Antonine Constitution, the role of the Roman army as a path to citizenship, and the long-term consequences for provincial identity.