Greek philosophers were thinkers in ancient Greece who sought to understand the world and human existence through reason and observation. They explored various subjects, including ethics, politics, metaphysics, and science. Notable figures include Socrates, Plato, and Aristotle, each contributing significantly to Western philosophy. These philosophers often engaged in dialogue and debate, encouraging critical thinking and questioning of accepted beliefs. Their ideas laid the groundwork for many fields, influencing later thinkers and shaping modern philosophy, science, and political theory. Their legacy continues to be studied and appreciated today.