Seneca (c. 4 BCE - 65 CE), fully Lucius Annaeus Seneca the Younger, was a Roman Stoic philosopher, statesman, dramatist, and advisor to Emperor Nero. He's one of the most complex and controversial figures of ancient Rome - a philosopher who preached virtue while amassing enormous wealth, and a Stoic sage who served one of history's most notorious tyrants.

Born in Córdoba, Spain, Seneca came to Rome as a child and received an excellent education in rhetoric and philosophy. He became a successful lawyer and senator but was exiled to Corsica in 41 CE by Emperor Claudius on charges of adultery. Eight years later, Agrippina (Claudius's wife) recalled him to tutor her son, the future Emperor Nero.

When Nero became emperor in 54 CE, Seneca, along with the praetorian prefect Burrus, essentially ran the empire. The first five years of Nero's reign were considered remarkably good, largely due to Seneca's influence. However, as Nero grew more erratic and violent, Seneca found himself increasingly compromised, amassing a fortune of 300 million sesterces while writing about the virtues of poverty.

His philosophical works include moral essays like "On Anger," "On the Shortness of Life," and "On the Happy Life," plus 124 surviving letters to his friend Lucilius that explore Stoic themes. These writings, with their practical focus on how to live well, deal with adversity, and face death, made Stoicism accessible to Roman audiences and later influenced Christian thinkers.