The famous Roman orator known for his speeches against Mark Antony was Cicero. A statesman, lawyer, and philosopher, Cicero was a central figure in the late Roman Republic and utilized his oratory skills to oppose Antony following Julius Caesar's assassination. His Philippics, a series of speeches delivered in 44-43 BCE, vehemently criticized Antony’s ambitions and actions, advocating for the preservation of the Republic. Cicero's contributions to rhetoric and philosophy greatly influenced later Western thought, particularly in the realms of political theory and ethics. His ability to sway public opinion through oratory remains a critical aspect of political communication even today.