Accounts of pestilence in the historical record help us understand those assumptions about the effects of disease that inform both the creation of the plague narrative and its reception among Roman audiences. Chapter 2 examines Livy’s Ab Urbe Condita in order to suggest that the historical experience and representation of plague in Rome was infused with resonance of civil strife by the Augustan period. Livy refines his source material to address a body politic in need of healing and thus sharpens the correlation between contagium and civil discord (discordia), especially in early episodes recounting the struggle of the orders. The historian’s narratives of contagion draw partly from the language of medical writers, but equally from a historiographic tradition that correlated a diseased body with a diseased body politic. Accounts of plague allow Livy to reflect on distinctions among members of different orders, especially the patres/patricii (highest class of citizens) and plebs (lowest class of citizens). The remedies enacted to combat plague, in forms of both cultural and political innovations, prove alternatingly salubrious and detrimental to the body politic. Livy recognizes, however, that, as a challenge to the people equivalent to strife within and war abroad, pestilentia could have a positive impact on the development of Roman hegemony and prompt coalescence among a divided citizenry.