Epicurus was an ancient Greek philosopher who lived from 341 BCE to 270 BCE. He is known for his philosophical school of thought called Epicureanism, which emphasized the importance of living a happy and fulfilled life through the pursuit of pleasure and the avoidance of pain.
Epicurus believed that the ultimate goal in life was to achieve ataraxia, or a state of tranquility and freedom from fear and anxiety. He taught that this could be achieved by living a simple life, cultivating friendships, and avoiding excesses of any kind.
Xenophon was a Greek historian, philosopher, and soldier who lived in ancient Greece from around 430-354 BCE. He was a student of Socrates and is known for his historical works and his writings on philosophy and politics.
Aristotle (384-322 BCE) was a Greek philosopher and scientist who is considered one of the most important figures in Western thought. He was a student of Plato and tutored Alexander the Great. Aristotle is known for his wide-ranging contributions to philosophy, including works on ethics, politics, metaphysics, logic, biology, and physics.
Plato was a Greek philosopher who lived in ancient Greece from around 427-347 BCE. He was a student of Socrates and a teacher of Aristotle. He is considered one of the most important figures in the development of Western philosophy, and his work has had a profound influence on the development of Western thought.