Greek philosophy is a system of thought that emerged in ancient Greece around the 6th century BCE. It focuses on understanding fundamental questions about existence, knowledge, ethics, and the nature of reality. Key figures include Socrates, Plato, and Aristotle, who laid the groundwork for Western philosophical traditions. Philosophers often used reason and dialogue to explore ideas, emphasizing critical thinking and the pursuit of wisdom. They sought to understand the world through observation and rational argument, influencing various fields such as science, politics, and ethics. Their ideas continue to shape modern philosophy and thought today.