Aristotle

Aristotle was a Greek philosopher born in 384 BCE in Stagira, in northern Greece. After studying for about twenty years at Plato's Academy in Athens, he later became the tutor of the young Alexander, who would become Alexander the Great. Around 335 BCE, Aristotle returned to Athens and founded his own school, the Lyceum.

Rather than limiting himself to philosophy, he explored many fields, including logic, biology, ethics, politics, rhetoric, poetry and the study of nature. His writings sought to understand the world through careful observation, logical reasoning and the comparison of facts. Although many of his works have been lost, those that survive had a lasting influence on education and intellectual life for centuries.

Aristotle believed that knowledge develops by examining reality before drawing conclusions. This approach made him one of the earliest thinkers to give systematic importance to observation, even though some of his scientific explanations were later corrected as knowledge advanced. He also created the first comprehensive system of formal logic used in the Western tradition, providing methods for testing whether an argument is valid.

In ethics, he argued that a fulfilling life comes from cultivating virtues such as courage, fairness and moderation through habit and thoughtful choice. His ideas shaped medieval philosophy in both the Islamic world and Christian Europe, and they continue to influence philosophy, science and political thought today.