The Roman philosopher known for his writings on ethics and politics is Cicero. He was a statesman, orator, and philosopher who lived during the late Roman Republic. Cicero's works, such as "De Re Publica" and "De Officiis," explore moral philosophy, the nature of justice, and the responsibilities of citizenship. He emphasized the importance of natural law and the role of reason in governance. His ideas influenced Western political thought, particularly during the Renaissance, and he is regarded as a significant figure in the development of ideas about civil rights and republican government.