Marcus Aurelius was a Roman Emperor from 161 to 180 AD and is best known for his philosophical writings, particularly his work titled Meditations. He is often regarded as one of the most important Stoic philosophers, emphasizing the importance of reason, self-discipline, and virtue in the face of adversity. His reign was marked by military conflict and challenges, yet he remained committed to his philosophical principles. Marcus Aurelius believed in the idea of serving the common good and maintaining a sense of duty, which has inspired countless individuals throughout history to adopt a Stoic mindset in their own lives.