Stoicism is a philosophical school of thought that originated in ancient Greece, founded by Zeno of Citium in the early 3rd century BC. It teaches the development of self-control, fortitude, and indifference to external circumstances as a means of achieving inner peace and tranquility. Stoics believe that individuals should focus on what is within their control, accept what they cannot change, and cultivate a virtuous life guided by reason. Key Stoic philosophers include Seneca, Epictetus, and Marcus Aurelius, whose writings continue to influence modern philosophy and psychology.
