Lucius Annaeus Seneca, commonly known as Seneca, was a Roman philosopher, statesman, and playwright who lived from 4 BCE to 65 CE. He is best known for his contributions to Stoicism, a school of philosophy that emphasizes rationality, self-control, and virtue as a means to achieve a good life. Seneca's writings often focus on the importance of inner peace and resilience in the face of adversity. Seneca's works, including letters and essays, explore themes such as the nature of happiness, the inevitability of death, and the value of wisdom. His ideas have influenced many thinkers throughout history and continue to be relevant in modern discussions about ethics and personal development.