This project examines what legal writings from ancient Rome reveal about the political ideology, social values, and power dynamics in Roman history. I focus on these concepts through analyzing selections from two sets of speeches given by Cicero, a politician, loyal proponent of the Roman Republic, and philosopher educated in both Latin and Greek. Additionally, I explore the scholarship on Roman legal history to provide supplementary cultural context. The sociopolitical climate of the late Roman Republic was tumultuous. Near the beginning of Cicero’s political career, he gave a set of orations, In Catalinam, to the Senate that accused Catiline of conspiring against the consuls. Much later, Cicero tried to keep the Republic alive after Caesar’s assassination and accused Mark Antony of being disloyal to Caesar by wanting to create an empire. This urge to defend the Republic prompted Cicero to write his Philippicae to attack Mark Antony. These orations ultimately resulted in Cicero’s death, as Mark Antony wanted, and the Republic ended. My research compares Cicero’s In Catilinam 1, 2, and 4 and Philippicae 4, 5, and 14: both sets involve murder plots, denunciations of powerful men, and the senatus consultum ultimum decree for Republican emergency. Specifically, I analyze how Cicero uses oratory to convince the Senate to declare Catiline and Mark Antony as public enemies. This process reveals elements of Roman sociopolitical culture, such as values, threats, and legal procedures, and follows these differences in this short, but crucial, time period in Roman legal and governmental history. Furthermore, it demonstrates the complexity between the government and the conflicting political ideologies during the late Roman Republic. Thus, through detailed analysis of these selected passages and their wider contexts, I explore how the Catilinarian and Philippic orations use references from Rome’s earlier history to adapt to, and reflect, their particular moments.